A sphere of ice is not a bar affectation. It is the shape with the least surface area for a given volume, so it exchanges heat with your drink more slowly than the same amount of ice cut into cubes, and a whiskey poured over one stays a whiskey for longer instead of turning into cold water in fifteen minutes. That is the whole argument for this category, and everything else is about whether the mold you buy is a pleasure or a chore. We looked at 8 of them from Tovolo, Housewares Solutions, Ticent and more, sorted by ball diameter, mold design and how cleanly each one lets go of the ice, with owner ratings current as of September 2026.
Our top pick is the Tovolo Craft Ice Sphere Mold for its rigid two part construction, which holds a proper round shape instead of giving you a slumped ball with a flat side. Below we sort the field by mold design first, since a two part craft mold, a lidded silicone tray and a stackable small ball tray are three different tools that happen to share a shape. For more of the drinks cupboard, our home and kitchen section covers the adjacent gear.
Pros
- Rigid shell holds a true round shape instead of bulging
- Fill line removes the guesswork about expansion
- Cap seals the top so the ball freezes clean
- Produces the most convincing bar style ice in this list
- Two molds means two drinks ready at once
Cons
- Makes only two spheres per freeze
- Tall shape needs vertical clearance in the freezer
- Needs a firm twist and a moment at room temperature to release
The Tovolo craft mold is the design that separates a proper sphere from a ball with a flat side. Instead of a floppy silicone tray, each mold is a rigid two part shell that holds its shape while the water expands, so the ice comes out round rather than slumped.
The fill line matters more than it sounds. Water expands as it freezes, and overfilling is what welds the halves of any mold together and forces water out around the seam. A marked line takes the judgment out of it, which is why this mold leaks less than most.
Two molds in a set is the right number for the way people actually use these. It covers two drinks, and because each mold is separate you can freeze one and leave the other out rather than committing a whole tray.
The limits are capacity and height. This is not the mold for stocking a freezer before a party, and its vertical shape needs clearance that a packed freezer drawer may not have. Measure before ordering rather than after.
Bottom line: the best ice in this list, as long as you only need a couple of spheres at a time.
- Type: rigid two part craft mold
- Quantity: set of 2 molds, one sphere each
- Sphere: large, sized for an old fashioned glass
- Fill: marked fill line
- Closure: sealing cap
- Care: dishwasher safe
This is for the person who drinks whiskey neat over ice and cares how the ball looks in the glass. It suits a household that pours one or two at a time rather than serving a room, and it is the wrong tool if you need a dozen spheres ready for guests.
Fill to the line with cooled boiled water for the clearest result, seat the cap firmly and stand the mold upright on a level shelf. To release, let it sit at room temperature for about thirty seconds, twist the halves gently to break the seal and push the ball out from below rather than pulling at the ice.
Pros
- Largest spheres here at 2.5 inches
- Square cube tray covers highballs and stirred drinks
- Two shapes in one purchase rather than choosing
- Flexible silicone releases without a fight
- Flat trays stack in a freezer drawer
Cons
- 2.5 inch spheres will not clear the rim of a standard tumbler
- Flexible silicone bulges slightly, so the balls are not perfectly round
- Two trays take up more shelf area than one
Samuelworld takes the sensible position that a house needs two shapes rather than one. The combo pairs a 2.5 inch sphere tray with a 2 inch square cube tray, and between them they cover a spirit served neat over ice and a long drink built in a highball.
The spheres are the biggest here, and size is what makes a sphere work. A larger ball has proportionally less surface area for its volume, so it holds out longer against a warm room. The catch is glassware: at 2.5 inches these are cut for a large double old fashioned and they will sit on the rim of a normal tumbler.
Being flexible silicone rather than a rigid shell, release is easy and the shape is slightly less exact. There is a seam around the equator and a small flat where the fill hole sat, which nobody notices once the ball is in a glass.
Both trays are flat, so they stack in a drawer in a way the tall craft molds cannot. That is a real advantage if freezer space is the constraint rather than ice quality.
Bottom line: the pick if you want the largest spheres and a big cube tray in the same purchase, provided your glasses are large.
- Type: two flexible silicone trays
- Spheres: 2.5 inches
- Cubes: 2 inches square
- Material: BPA free food grade silicone
- Closure: lids on both trays
- Storage: flat stacking
Buy this if you own large double old fashioned glasses and make both spirits over ice and longer stirred drinks. It is also the right pick for a household that wants to settle the whole ice question in one purchase rather than buying a second tray later.
Measure the mouth of your glass before you commit to 2.5 inch spheres, since that is the one specification that can make the purchase useless. If your glasses are standard rocks tumblers, a 2 inch mold is the better fit and this tray's cube side will still be useful.
Pros
- Twelve spheres per freeze, the highest sphere capacity here
- 1.9 inches fits a standard rocks glass without perching on the rim
- Includes a lidded storage container so ice can be batched ahead
- Tongs included, which keeps fingers off the ice
- Twist release rather than prying
Cons
- Two trays plus a container need real freezer space
- Flexible silicone leaves a visible seam on each ball
- Storage container is only useful if you have room for it
WIBIMEN is the set built for serving other people. Twelve spheres per freeze plus a lidded storage container means you can build a stock during the week instead of freezing to order, which is the difference between offering a proper drink to four guests and apologising for the ice.
The 1.9 inch diameter is well judged. It is close enough to two inches to look right in a standard rocks glass and it clears the mouth of normal glassware, which the 2.5 inch molds do not. For most homes this is the more useful size.
The storage container is the part that changes how the set gets used. Loose ice in a freezer drawer picks up odors and sublimates faster; a sealed bin keeps spheres clean tasting for far longer and stops them fusing into a lump.
Tongs are a small thing that turns out to matter, because a warm hand melts a groove into a sphere in seconds and leaves fingerprints in the surface.
Bottom line: the batching pick, and the best choice if you serve drinks to guests rather than to yourself.
- Type: two flexible silicone sphere trays
- Capacity: 12 spheres per freeze
- Diameter: 1.9 inches
- Included: lidded storage container and tongs
- Release: easy fill and twist
- Material: BPA free silicone
This is for anyone who entertains, or who wants a stock of ice ready rather than remembering to fill a mold two hours before a drink. It suits a freezer with a spare drawer, since two trays and a bin is a real footprint.
Wash the silicone before first use to get rid of the manufacturing smell, and keep the storage container sealed so the ice does not take on freezer odors. Do not stack heavy items on a filled tray before it has frozen solid, and let the spheres firm up completely before transferring them to the bin or they will flatten where they touch.
Pros
- Two useful shapes in one purchase
- Lids keep freezer odors out of the ice
- Reusable BPA free silicone that releases without prying
- Flat trays stack easily in a drawer
- Covers both a spirit over ice and a long stirred drink
Cons
- Flexible silicone gives a softer sphere shape than a rigid mold
- Ball diameter is not clearly published, so check against your glass
- Lids need a firm push to seat properly
Ticent covers the same two shape logic as the larger combos in a simpler package: one lidded sphere tray and one large square cube tray, both flexible silicone, both flat enough to stack.
The lids are the part worth paying attention to. An open tray lets ice pick up whatever the freezer smells of, and in a drawer shared with food that happens quickly. A closed lid also stops water sloshing out on the way from the tap to the shelf.
As a flexible mold it gives a slightly softer sphere than a rigid craft shell, with a seam around the equator. In a glass with a dark spirit poured over it, that difference disappears.
The one gap is that the ball diameter is not clearly stated. Measure the mouth of your rocks glass and treat the sphere as a standard bar size rather than assuming it will suit an unusually narrow tumbler.
Bottom line: the most sensible way into the category, with both shapes covered and nothing to go wrong.
- Type: two flexible silicone trays
- Shapes: spheres and large square cubes
- Closure: lid on each tray
- Material: reusable BPA free silicone
- Storage: stacks flat
- Use: whiskey, bourbon, cocktails
This is the pick for someone buying their first sphere mold who does not want to choose between shapes yet. It also suits a shared kitchen, since the lids keep the ice tasting clean in a drawer that holds food as well.
Fill through the holes until the water just reaches the underside of the lid, not past it, and set the tray flat on a level shelf. Freeze solid before moving. To release, flex the base of one cavity at a time rather than twisting the whole tray, which is what tears the thin walls between cavities over time.
Pros
- 2 inch spheres are the size that suits a standard rocks glass
- Sphere and square trays cover both serving styles
- Lids on both trays keep odors out and water in
- Simple silicone construction with no parts to lose
Cons
- Sold without a brand name, so support and replacements are uncertain
- Flexible tray gives a seam and a small flat at the fill hole
- Lids need to be seated carefully or they leak in transit
This unbranded set does the same job as the named two tray combos and gets the most important number right: the spheres are 2 inches, which is the diameter that actually fits a standard old fashioned glass rather than sitting on the rim.
The pairing of spheres with large square cubes is the practical setup for a home bar. The ball goes in a glass of whiskey, the cube goes in a highball, and neither shape has to compromise for the other.
Both trays carry lids, which is what keeps the ice clean tasting in a freezer drawer shared with food and stops the water spilling on the walk from the tap to the shelf.
The honest caveat is that this is a generic listing without a brand behind it. The silicone and the shape are conventional, but there is no maker to go back to if a lid warps, so treat it as a straightforward purchase rather than a long term commitment.
Bottom line: the right sphere size and both shapes covered, with the usual uncertainty of an unbranded listing.
- Type: two flexible silicone trays
- Spheres: 2 inches
- Second tray: large square cubes
- Closure: lid on each tray
- Use: whiskey, bourbon, cocktails
- Care: hand wash or dishwasher
This suits someone who wants the standard two tray setup at the standard sphere size and is not attached to a brand name. It is a reasonable second set to keep alongside a craft mold so there is always ice ready.
Check the lid seating on arrival by filling one tray with water and carrying it to the freezer slowly; a lid that lifts at a corner will spill every time. If a listing like this is out of stock, the equivalent from a named maker is the safer repeat purchase, since the design is common rather than special.
Pros
- Four balls per freeze rather than one or two
- 4.5 centimeters suits a smaller tumbler where a 2 inch ball will not fit
- Simple one piece silicone tray with nothing to assemble
- Long established design with a large owner base
Cons
- Smaller balls melt faster than the 2 inch and 2.5 inch options
- Lowest owner rating of the sphere molds here
- Open style tray means the ice picks up freezer odors more readily
The Froz mold is one of the older designs in this category and it answers a question the bigger molds ignore: what do you use if your glasses are not large. At 4.5 centimeters, roughly one and three quarter inches, these balls drop into a shorter tumbler that a 2 inch sphere would perch on.
Four balls per freeze puts it between the craft molds and the batching sets. That is enough for an evening with a guest without needing a storage bin, and the tray is simple enough that there is nothing to assemble or lose.
The physics cuts both ways at this size. A smaller ball has proportionally more surface area, so it melts faster than the larger spheres here. In a short pour that is not a problem, and in a long slow drink it is.
Owner ratings for this one sit lower than the rest of the sphere molds in the list, which is worth knowing rather than glossing over. It is a workable mold at a useful size rather than the best made thing here.
Bottom line: the pick when your glassware is small, with the melt rate and the build quality that come with that size.
- Type: flexible silicone mold tray
- Capacity: 4 balls per freeze
- Diameter: 4.5 centimeters, about 1.75 inches
- Material: food grade silicone
- Suits: shorter tumblers and short pours
- Care: hand wash
Choose this if your rocks glasses are on the small side, or if you want more than two balls without buying a full batching set. It is the wrong pick if you own large old fashioned glasses, where a bigger sphere will both look and perform better.
Wash the silicone before first use and store the tray away from strongly smelling food, since an open style mold gives ice more chance to pick up odors. Fill just short of the top to allow for expansion, and let the balls stand for half a minute before you try to release them.
Pros
- Makes a large number of small round cubes at once
- Stackable trays plus a bin keep the freezer tidy
- Round cubes suit water bottles, soft drinks and iced coffee
- Lid keeps odors out and lets the trays stack safely
- Cubes release with a light press rather than a twist
Cons
- Small rounds melt and dilute quickly, so they are wrong for whiskey
- Not a bar sphere despite the round shape
- The full stack takes a noticeable amount of freezer space
This is a different tool wearing the same shape. The cubes are small rounds rather than bar sized spheres, and the system is built around volume: fill the trays, press the cubes into the bin underneath, refill, and you have a supply of round ice ready.
For everyday drinking that is genuinely useful. Small rounds slide into a water bottle neck where a square cube jams, they pack neatly into a glass of soft drink, and they are the right size for iced coffee where you want cooling without a single lump in the way.
What they are not is whiskey ice. A small ball has a large surface area relative to its volume, so it melts fast and dilutes a spirit quickly, which is exactly the problem the large spheres in this list exist to solve.
The stacking design and the included bin are the reason to prefer this over a plain tray. Ice kept in a lidded bin stays clean tasting, and the trays sit on top of each other rather than needing their own shelf.
Bottom line: the everyday round ice option, and a poor substitute for a proper sphere mold if whiskey is the point.
- Type: stackable round cube trays with bin
- Ice: small round cubes, not bar spheres
- Included: lidded storage bin
- Material: BPA free food grade
- Suits: water, soft drinks, iced coffee
- Release: press from below
This is for the household that gets through a lot of ice in water bottles, soft drinks and iced coffee, and wants it round rather than square. Anyone shopping for whiskey ice should stop at the large sphere molds higher up this list.
Fill the trays, freeze flat, then press the cubes through into the bin and refill the tray straight away so a stock builds up. Keep the bin lid closed between uses, because loose round cubes have a lot of surface area and take on freezer odors faster than a large sphere does.
Pros
- Ninety nine cubes across three trays covers a household easily
- 0.8 inch rounds fit through a water bottle neck
- Lid and bin included so ice can be stored rather than used immediately
- Three trays let you keep refilling while a batch freezes
- Light and quick to freeze
Cons
- 0.8 inch rounds melt very quickly and are wrong for spirits
- Three trays plus a bin is a lot of freezer space for small ice
- Small cavities are more fiddly to fill without spilling
Optish takes the small round idea to its logical end: three trays, ninety nine cubes, a lid and a bin. At 0.8 inches these are small enough to pour rather than place, and the point of the set is having plenty of them.
The size is chosen for bottles and tumblers rather than for spirits. A 0.8 inch round drops through the neck of a sports bottle, which square cubes cannot do, and a handful of them chills a soft drink faster than one large piece because of the extra surface area.
That same surface area is why these have no place in a whiskey glass. Small ice melts quickly and dilutes the drink, which is the opposite of what a sphere mold is for. Read this as a high volume everyday ice maker that happens to be round.
Three trays working in rotation is the practical part. Freeze one, tip it into the bin, refill and repeat, and a household that gets through ice never runs out.
Bottom line: the highest volume option here for small round ice, and firmly an everyday tool rather than a bar one.
- Type: three stackable round cube trays
- Capacity: 99 cubes in total
- Diameter: 0.8 inches
- Included: lid and storage bin
- Material: BPA free food grade
- Suits: water bottles, soft drinks, everyday chilling
This suits a busy household, a family that lives on iced water in summer, or anyone who wants ice that fits a sports bottle. It is not for whiskey, bourbon or any drink where dilution is the thing you are trying to avoid.
Decide by drink rather than by shape. If the ice is for water, soft drinks or iced coffee, buy on volume and this set wins easily. If it is for a spirit served over ice, buy one large sphere mold instead, because ninety nine small rounds will not do that job at any quantity.
How to Choose a Sphere Ice Mold
Six things decide whether a mold gets used every weekend or ends up at the back of the freezer. Two of them, ball size and mold design, are worth settling before you look at anything else.
Why a Sphere Melts Slower
Ice melts at the surface, so the amount of surface touching your drink is what sets the pace. A sphere is the shape with the smallest surface area for any given volume, which means a single large ball presents far less contact area than the handful of small cubes that would weigh the same. Less contact area means slower heat exchange, and slower heat exchange means less dilution while you drink. Harvey Mudd College’s Math Fun Facts page on the isoperimetric inequality notes that when the volume is fixed, the inequality constrains how small the surface area can be, and that a bubble tends to be spherical because it tries to minimize its surface area.
Size compounds the effect. Doubling the diameter of a ball multiplies its volume by eight while multiplying its surface area by only four, so a large sphere is dramatically more efficient than a small one. That is the real reason bars use one big ball rather than three medium ones, and it is why the small round trays at the end of this list serve a different purpose entirely.
Be realistic about the size of the effect. A big sphere buys you time, it does not stop melting, and a warm room and a warm glass will undo a good deal of it. Chilling the glass before you pour does as much for a drink as upgrading the ice, and the two work together.
Ball Diameter and Whether It Fits Your Glass
This is the specification people skip and then regret. Molds in this category run from about one and three quarter inches up to two and a half inches, and the difference between the ends of that range is the difference between a ball that drops into a rocks glass and one that sits on the rim. Measure the inside diameter of the mouth of your glass before ordering, not the widest part of the bowl.
Around two inches is the sweet spot for a standard old fashioned glass. It fills the glass visually, it leaves room for a decent pour, and it clears the mouth without scraping. Two and a half inch molds are made for a large double old fashioned and they look wrong in anything smaller, while the four and a half centimeter balls of the older novelty molds are closer to one and three quarter inches and suit a smaller tumbler.
Think about the ratio as well as the fit. A ball that nearly fills the glass leaves less room for spirit, which is fine for a slow measure and annoying if you pour generously. If you like a longer drink, a slightly smaller sphere or a large cube is the more practical choice.
| Ball size | Suits | Watch for |
|---|---|---|
| About 1.75 inches | Smaller tumblers and short pours | Melts faster than a two inch ball |
| About 2 inches | Standard rocks and old fashioned glasses | Measure the mouth of the glass, not the bowl |
| About 2.5 inches | Large double old fashioned glasses | Will not clear the rim of a normal tumbler |
| Around 1 inch and under | Water, soft drinks, iced coffee, bottles | Dilutes a spirit quickly, wrong tool for whiskey |
Mold Design: Craft Molds, Lidded Trays and Stackable Trays
A craft mold is a rigid two part shell, usually holding two spheres, with a fill line and a cap that seats on top. Because the shell holds its shape, the ball comes out properly round rather than sagging where the silicone bulged. This is the design that produces the most convincing bar ice, and the trade-off is that it makes only a couple at a time and takes a fair amount of freezer height.
A lidded silicone tray is the mainstream answer: a flexible base of half spheres with a lid that closes over them and fill holes on top. It makes four to six at once, it stacks better, and it is much easier to store. The compromise is a visible seam around the equator of each ball and a slight flat spot where the fill hole sat, neither of which matters once the ball is in a glass.
Several sets pair a sphere tray with a large square cube tray, and that combination is more useful than it first appears. Big cubes suit a highball or a stirred drink served long, spheres suit a spirit served neat over ice, and having both means you are not choosing one shape for every drink in the house.
Clarity: What These Molds Can and Cannot Do
Cloudy centers are the most common complaint in this category and almost none of it is the mold’s fault. Water freezes from the outside in, and dissolved air and minerals get pushed ahead of the freezing front until they end up trapped in the middle. That white core is air, not dirt, and it is what ordinary freezing does in any sealed shape.
Clear ice comes from directional freezing, which means insulating every side of the water except the top so the ice forms downward and pushes the air out of the opening. Bars do this in a chest freezer with a large insulated tub and then cut the block. You can approximate it at home by standing a mold inside a small insulated cooler with the lid off, though the mold has to fit and the freeze takes far longer. Purdue University’s materials engineering explainer on ice cubes describes clear ice as formed by freezing the water from one end to the other, which lets the excess air be pushed across the slab and eventually released into the air.
The simple improvements are worth knowing. Boiled and cooled water carries less dissolved air and gives a noticeably clearer ball, filtered water beats hard tap water, and freezing slowly at a slightly warmer setting helps more than freezing fast. The University of Illinois Physics Van notes that the easiest way to get most of the bubbles out is to start with water that has most of the dissolved air out, and suggests boiling the water first or just letting it sit out for a while. None of this produces bar clarity from a sealed sphere mold, so treat a claim of perfectly clear ice with suspicion. Our article archive covers more of the kitchen from the same angle.
Release, Leaks and the Freezer Shuffle
Getting the ball out is where a mold is won or lost. Soft silicone peels away easily but bulges while freezing; rigid shells hold a truer sphere but need a firm twist and a moment at room temperature. Either way the technique is the same: let the mold sit for thirty seconds, twist gently to break the seal, then push from underneath rather than pulling at the ice.
Leaking is the other running complaint, and overfilling causes most of it. Water expands as it freezes, so filling above the line forces the excess out around the seam and welds the two halves together with a frozen collar. The USGS Water Science School notes that upon freezing, the density of water decreases by about 9 percent. Fill to the mark, close the lid firmly, and carry the mold flat with a hand underneath rather than by one edge.
Freezer geometry decides whether you will keep using it. A tall craft mold needs vertical clearance that a packed freezer drawer may not have, while a flat lidded tray slides under a shelf and takes a bag of peas on top of it. Measure the space you actually have before buying the taller design, because a mold that does not fit is a mold that never gets filled.
Odor, Batching and Storing the Ice
Silicone picks up freezer smells, and ice picks them up from the silicone. A mold with a proper lid rather than an open tray is the first defense, and washing new silicone before first use removes the manufacturing smell that otherwise ends up in your first few drinks. Keep the mold away from anything strongly aromatic in the same drawer.
If you serve more than one or two drinks at a time, batching matters. A mold that makes four to twelve spheres, or a set that comes with a lidded storage container, lets you build a stock over a week rather than freezing to order. Ice kept in a sealed container also stays clean tasting far longer than ice left loose in a freezer drawer.
Sublimation is the reason old ice tastes stale. Even below freezing, ice slowly evaporates and shrinks, and the surface picks up whatever is in the air around it. The USGS Water Science School’s page on sublimation describes it as snow and ice changing into water vapor in the air without first melting into water. Spheres held more than a couple of weeks lose their shine and their edge; make them in the week you intend to use them and the difference is obvious. More departments are indexed in our category directory.
Why You Should Trust Us
We build these lists from published specification and from the pattern of what long-term owners report, rather than from the marketing copy on the box. For each mold here we compared the stated ball diameter against standard glassware, the mold construction, how many spheres a single freeze produces, whether a lid and a fill line are included, the material claims, and whether the set ships with a storage container or tongs.
We also set aside near-identical listings that differ only in color or bundle contents, so every entry here is a genuinely different mold. Where a listing advertises crystal clear results from a sealed mold, we say what the physics actually allows rather than repeating the claim, and where a product makes small round cubes rather than bar sized spheres we place it accordingly instead of letting the shape imply the use.
Final Thoughts
Best overall is the Tovolo Craft Ice Sphere Mold. The rigid two part shell is what separates a proper round ball from a slumped one, the fill line takes the guesswork out of expansion, and it is the mold that produces ice you would be happy to serve to someone who cares about their whiskey.
Best value is the Ticent sphere and square set. Two lidded trays covering both useful shapes, a sensible ball size for a standard rocks glass, and enough capacity to keep a stock in the freezer rather than freezing to order.
For specific needs, the Samuelworld combo is the pick if you want the largest spheres and big cubes together, the WIBIMEN set is the one to buy for batching because it comes with a storage container and tongs, and the Housewares Solutions Froz mold suits a smaller tumbler where a two inch ball would sit on the rim. If what you actually want is small round ice for water, soft drinks and iced coffee rather than for spirits, the stackable round tray with a bin and the Optish three pack are the two here that do that job. Brand pages for the makers we track sit in our store directory.
Sphere Ice Mold FAQs
Does sphere ice really melt slower than cubes?
Yes, and the reason is geometry rather than marketing. Ice melts where it touches liquid, and a sphere has the smallest surface area of any shape for a given volume, so one large ball exchanges heat more slowly than the several small cubes that would weigh the same. Size matters as much as shape: doubling a ball’s diameter multiplies its volume by eight but its surface area by only four. The effect is real but not magic, so chill the glass as well if you want the drink to hold.
Why is my sphere ice cloudy in the middle?
That white core is trapped air, not dirt. Water freezes from the outside in, pushing dissolved air and minerals ahead of the freezing front until they are sealed in the center with nowhere to escape. Every closed mold does this. Boiling the water and letting it cool before freezing removes some of the dissolved air and gives a clearer result, and filtered water helps more than hard tap water. Genuinely clear ice needs directional freezing in an insulated container, which no sealed sphere mold can do on its own.
What sphere size fits a standard rocks glass?
Around two inches is the standard answer and it suits most old fashioned glasses. Measure the inside diameter at the mouth of your glass rather than the widest point of the bowl, because that opening is what the ball has to clear. Two and a half inch spheres are made for a large double old fashioned and will perch on the rim of a normal tumbler, while smaller balls around one and three quarter inches suit a shorter glass and a shorter pour. Check the glass first and the mold second.
How do I get the ice out without cracking the mold?
Let it stand at room temperature for about half a minute first, which releases the bond between ice and silicone and does more than force ever will. Twist the mold gently to break the seal, then push the ball out from underneath rather than pulling on the ice or prying with a knife. If the halves are frozen together, you overfilled it: run the seam under cold tap water for a few seconds and it will separate. Never flex a rigid shell hard while it is still deeply frozen. Our home and kitchen picks cover the rest of the bar cupboard.
How long can I keep sphere ice in the freezer?
Use it within a week or two for the best result. Ice sublimates even below freezing, so it slowly shrinks, loses its polish and takes on whatever the freezer smells of, and a sphere made a month ago is visibly duller than a fresh one. Storing the balls in a sealed container rather than loose in a drawer slows all of that down considerably, which is why sets that include a lidded bin are worth the extra space. Wash new silicone before first use as well, or the first batch tastes of the packaging.
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