4 1/2 x 4 x 3/4 Re-Freez-R-Brix Cold Bricks 42/Case

These cold bricks are leak-proof, reusable, and cost-effective. They're made from food-safe, non-toxic materials that stay colder than ice. Tests prove they're the coldest and best gel refrigerant you can get.

To use these cold bricks, simply place them in the freezer until they're fully frozen. Once frozen, you can put them in your cooler, lunch box, or wherever you need some extra cooling. They're great for keeping food and drinks cold during picnics, camping trips, or just everyday use. When they start to warm up, just pop them back in the freezer to reuse. Make sure to keep them away from sharp objects to avoid punctures. There's no special maintenance needed, just keep them clean and store them in a cool place when not in use.