Short answer
What is the difference between an ice block mold and a reusable ice block?
As represented here, the mold side is a set of silicone molds that freeze water into blocks, while the reusable side is a single lidded silicone form that freezes water into one large block. Both are reusable forms, not ready-made ice, and both are dishwasher safe per their listings.
Side by side Choose an ice block mold if Choose a reusable ice block if
For a cold plunge at home, the ice has to be ready when the routine calls for it, and the freezer has to hold whatever makes that ice. The choice in ice block mold vs reusable ice block comes down to making many smaller blocks in a set or making a single large block in a lidded form, and each route suits a different freezer and a different session.
Verdict: pick the mold set if several smaller blocks and flexible freezer packing suit the routine, and pick the reusable block form if a single large block with a lid suits the routine better. This comparison covers block size, freezer time, release and upkeep, with the listings for each route. Listings were collected 28 October 2026.
This article is informational and is not medical advice. Cold water triggers a gasp reflex and fast breathing, and your core temperature keeps falling after you get out (afterdrop). Never plunge alone, keep your head above water, and ask a clinician first if you have a heart condition, high blood pressure, or are pregnant. See our Medical Disclaimer and our cold plunge safety guide.
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Quick picks
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1
Ice Block Form With Lid Makes 12 Lb. Ice Cube 11" Chill Score 9.6/10Check price on AmazonA single lidded silicone form stated to make a block of up to 12 Pounds for an ice bath tub, cold plunge tub or cooler.
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2
5Pcs Extra Large Ice Block Mold Chill Score 9.6/10Check price on AmazonA set of 5 silicone molds stated to make large ice blocks for an ice bath tub, cold plunge or cooler.
A single lidded silicone form stated to make a block of up to 12 Pounds for an ice bath tub, cold plunge tub or cooler.
Pros & ConsViewHide
Pros
- Single block stated up to 12 Pounds
- Lid included with the form
- Metal reinforced rim for stability
- Food grade silicone, BPA Free, dishwasher safe
Cons
- Title size of 11 inches by 7 inches by 5 inches differs from the spec table size
- Only 1 block per freeze, with no second form included
- No warranty term is stated
- No UL or ETL listing is stated
A set of 5 silicone molds stated to make large ice blocks for an ice bath tub, cold plunge or cooler.
Pros & ConsViewHide
Pros
- Set of 5 molds for flexible use
- Each mold stated up to 2.3lbs of ice
- Soft food grade silicone, dishwasher safe
- Reinforced side design for shape integrity
Cons
- Set figure of up to 7lbs at a time does not reconcile with the per-mold figure of up to 2.3lbs
- No lid is stated for these molds
- No warranty term is stated
- No UL or ETL listing is stated
More to compare
GLAZER MAXCheck price on Amazon
2 x 12 Lbs XXL Ice MoldsCheck price on Amazon
Extra Large Ice Block Molds 4 Pack 32LB for Cold Plunge TubCheck price on Amazon
Extra Large Ice Block Molds 4 Pack 48LB for Cold Plunge TubCheck price on Amazon
4PC Extra Large Ice Cube MoldsCheck price on Amazon
Haldane 2PC Extra Large Ice Block MoldsCheck price on Amazon
Ice block mold vs reusable ice block at a glance
| Ice block mold set | Reusable ice block form | |
|---|---|---|
| Example listing | Mouwaii set | MT.BAY form with lid |
| Block size stated | Each mold up to 2.3lbs, set up to 7lbs at a time | Up to 12 Pounds per block |
| Pack count | 5 Count | 1 Count |
| Freezer time stated | 24 hours | About 24 hours |
| Release | Demold after it sits for a while | Release after 5-10 minutes out of the freezer |
| Material stated | Food grade silicone | Food grade silicone, BPA Free |
| Dishwasher safe | Stated dishwasher safe | Stated dishwasher safe |
How the two sides differ
The clearest difference is block size against pack count. The Mouwaii mold side gives a set of 5 molds, each stated to make up to 2.3lbs of ice, with the set stated to make up to 7lbs at a time. Those two figures do not reconcile, since filling every mold to its per-mold figure would pass the stated set total, so the set figure is the one to plan around. The MT.BAY reusable side gives a single form stated to make a block of up to 12 Pounds, with a lid included. A set of smaller blocks can be split across uses such as a tub, a cooler or a short trip, while a single large block suits a session that needs one long-lasting block, per the listings.
Both listings state food grade silicone and a reinforced design: the Mouwaii molds state a reinforced design on the sides for stability and shape integrity, and the MT.BAY form states a metal reinforced rim for stability during freezing and release. Both state dishwasher safe cleaning, and both state a freezer time of about a day: 24 hours for the Mouwaii set and about 24 hours for the MT.BAY form. Release differs in wording: the Mouwaii listing says to demold after the cube sits for a while, while the MT.BAY listing says to wait 5-10 minutes after removing the form from the freezer.
Neither listing states a warranty term or a UL or ETL listing, so neither side wins on those points. The Mouwaii set also states use as a cake mold or baker mold, which is a secondary use, not a cold plunge advantage. For background on chilling a tub, see our cooler vs chiller for cold plunge comparison and our chest freezer vs cold plunge chiller comparison.
Gear for each route
These are scored on the Chill Score: performance, build, value, safety and warranty. Neither listing states a UL or ETL listing, so both score 0 for safety, and neither states a warranty term, so both score 0 for warranty.
| Product | Chill Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| MT.BAY Ice Block Form | 9.6 | 30 | 21 | 21 | n/a | 0 |
| Mouwaii Ice Block Mold | 9.6 | 29 | 20 | 20 | n/a | 0 |
Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score. Safety counts only for powered gear or where the listing states safety features; where it does not apply, the score is taken over the remaining 90 points.
Choose an ice block mold if
- You want a set of 5 molds that can make blocks for a tub, a cooler or a short trip.
- You prefer smaller blocks that can be split across uses rather than one large block.
- You want a soft silicone mold with a reinforced side design for easy release.
Choose a reusable ice block if
- You want a single large block of up to 12 Pounds for one session.
- You want a lid included with the form.
- You prefer a metal reinforced rim for stability during freezing and release.
Check Your Space First
- Check freezer shelf space for a set of 5 molds against a single lidded form sized 11 inches by 7 inches by 5 inches per the MT.BAY title.
- Leave space at the top of each mold for expansion: the MT.BAY listing states about ½ inch, and the Mouwaii listing says to leave some space at the top.
- Plan a flat freezer spot for about 24 hours of freezing, plus the release wait each listing states: a while for the Mouwaii set, and 5-10 minutes for the MT.BAY form.
- Check storage for the set or the form between sessions, since both are reusable and dishwasher safe.
Common questions
What is the difference between an ice block mold and a reusable ice block?
As represented here, the mold side is a set of silicone molds that freeze water into blocks, while the reusable side is a single lidded silicone form that freezes water into one large block. Both are reusable forms, not ready-made ice, and both are dishwasher safe per their listings.
How long does it take to freeze a block?
The Mouwaii listing states 24 hours in the freezer, and the MT.BAY listing states about 24 hours in the refrigerator freezer. Leave space at the top for expansion, since water expands as it freezes.
Which side makes more ice at once?
The MT.BAY form states a single block of up to 12 Pounds, while the Mouwaii set states up to 7lbs at a time across its 5 molds. The set suits splitting ice across uses, while the single form suits one large block.
Are these molds easy to clean?
Both listings state dishwasher safe cleaning, and both state food grade silicone. The MT.BAY form adds a lid, and the Mouwaii set adds a soft silicone body for easy release.
Can the molds be used for anything besides a cold plunge?
The MT.BAY listing states uses such as beach trips, camping, hunting, BBQ and fishing for keeping food and drinks cold. The Mouwaii listing states camping, fishing and short trips, plus use as a cake mold or baker mold.
Back to all cold plunge reviews.
