Best Ice Block Mold Large (2026)

How much ice you will need

The listings state total ice per freeze from 13 pounds on the single Gosmol mold to 25 pounds on the Haldane 4-pack and the Nicalas 10-pack. The YINOWON 6-pack states no ice weight, only the mold size of 8.5 by 4.5 by 2.5 inches. For a cold plunge tub, more ice per freeze means fewer freezer cycles: the Haldane and Nicalas both promise a full 25 pound load in one go, while the Gosmol makes one 13 pound block at a time. Match the mold count to your freezer space as well as your tub: ten molds sound generous until they have to fit around the frozen peas.

Best ice block mold large: size, material and capacity

All four are food-grade silicone, and the YINOWON and Gosmol state BPA free. The Haldane reinforces its four edges so the mold does not collapse when filled; the Gosmol uses a steel reinforced rim to prevent spills on the way to the freezer. Mold sizes run from 8.5 by 4.5 by 2.5 inches on the YINOWON to 11.9 by 7.9 by 5.1 inches on the Gosmol. Stated freeze times run from 12 hours on the Nicalas to 24 hours on the YINOWON, with the Haldane at 12 to 24 hours. The Nicalas states a working range of -40 to 446 degrees Fahrenheit, the widest here, though for ice you only need the cold end.

Who should not buy these

Skip the molds if you already own a chiller: a chiller holds the temperature without any ice at all. Skip them if your freezer is small, since even the smallest mold here needs a flat 8.5 by 4.5 inch footprint and the Gosmol needs nearly a foot of clearance. And skip them if you plunge rarely: bagged ice from the store is cheaper than four silicone molds for the occasional dip. These molds pay off for regular plungers who own a chest freezer.

Score notes

Each mold is scored on performance, build, value, safety and warranty from the listing alone. Performance weighs stated ice capacity per freeze; build weighs material and reinforcement; value weighs the mold count against the pack. No listing states a warranty term or a safety certification, so those score zero across the board. The Haldane leads on capacity per freeze with reinforced edges; the Nicalas follows on the 10-pack count.

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.

Common questions

How long do large ice blocks take to freeze?

The listings state 12 hours for the Nicalas, about 24 hours for the YINOWON, and 12 to 24 hours for the Haldane. Bigger blocks take longer; plan a full day ahead of plunge day.

How do you get the ice out of a silicone mold?

The Haldane says to let the mold stand for 15 minutes, then pour the block out. The Gosmol says to push with your fingers from the bottom of the flexible tray. Silicone releases easier than rigid plastic in both cases.

Are silicone ice molds food safe?

All four listings state food-grade silicone, and the YINOWON and Gosmol state BPA free. The Nicalas doubles as a cake and bread mold per its listing, which is the practical proof.

Can I use ice block molds for a cooler?

Yes. The Haldane, YINOWON and Gosmol listings all name coolers, camping and fishing as uses. Large blocks melt slower than cubes, so they keep food cold longer on a trip.

Do I need a mold if I have a chiller?

No. A chiller holds the water temperature on its own, which is the whole point of owning one. Molds are for plungers without a chiller; see our best cold plunge chillers if you are considering the upgrade.

Related: the best cold plunge chillers and the best cold plunge covers.