4 1/2 x 4 x 1 1/2 Re-Freez-R-Brix Cold Bricks 12/Case

These cold bricks are leak-proof, reusable, and cost-effective. Made from food-safe, non-toxic materials, they stay colder than ice. Tested to be the coldest and best gel refrigerant around.

Using these cold bricks is easy. First, place them in the freezer until they're fully frozen. Then, you can use them in coolers, lunch boxes, or anywhere you need to keep things cold. Remember to always keep them away from open flames and sharp objects to avoid damage. After each use, just put them back in the freezer for reuse. They're designed to be durable, but if you notice any signs of wear or leakage, it's time to replace them.