Ice Sheets are flexible, stores flat, use Hot or Cold stays cold much longer than the large heavy and unflexible Gel Packs. These ice sheets can be used over and over again. Can also be used for shipping or on a vacation, hiking trip * ThermaFreeze Ice sheets have also been proven to stay colder longer than ice . * Camping, Beaches, baby formulas, BYOB, Barbecues,. * No Leaking or Messes, Cut to size, eco-friendly