11 1/4 x 9 1/4 x 1 Re-Freez-R-Brix Cold Bricks 12/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. Tested to be the coldest and best gel refrigerant around.

To use these cold bricks, simply place them in the freezer until they're fully frozen. Then, you can use them in coolers, lunch boxes, or wherever you need to keep things cold. 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 prevent leaks. There's no special maintenance needed, just keep them clean and they'll last you a long time.