Jay Bags hot or cold re-usable insulated food bags are perfect for keeping your food at the right temperature for up to 3 hours when you're on the go! these water proof, food safe bags are made from foil, and insulated inside with foam. The handles snap together to keep your food warm or cool; whatever you choose. Place a cold pack in the bottom to keep food cold even longer. Jay Bags are more convenient than heavy Coolers and easier to store too. Each bag is lightweight and folds flat for easy storage when not in use. These washable can be re-used over and over. Take them to lunch, the beach, sporting events, holiday parties and more!.