The ARCTIC ICE Alaskan Series has a phase change (melting point) of 32°F and can efficiently keep food or drinks cold without risk of freezing and is reusable for years. The active ingredients are non-toxic and housed in a rugged container designed to provide maximum surface area to increase the efficiency at which they cool. In several tests, ARCTIC ICE Alaskan Series panels have maintained food-safe temperatures for hours, even days without the risk of freezing. When finished using, simply store in freezer until needed again. Freeze ARCTIC ICE Alaskan Series panels in any freezer 6-8 hours prior to use. ARCTIC ICE Alaskan Series panels can also be used in combination with ice to extend the life of ice up to 50%. ARCTIC ICE Alaskan Series panels are also top rack dishwasher safe! ARCTIC ICE uses non-toxic, high performance “phase change materials,” or PCM’s, to keep cooler temperatures anywhere from ice cold to frozen. Each panel is ruggedly designed with expanded surface area to provide exceptional cooling capacity and efficiency. Spin welded seals keep our panels leak free for a lifetime of use. ARCTIC ICE products are proudly made in the USA and are warrantied against defects from workmanship for life.