The Traveler Lunch Bag features PackIts patented cooling technology. Freezable gel built into the walls of the bag chill a sandwich, a snack, and a 12oz (340ml) drink for hours. That means no extra ice packs to lose or forget in the freezer To use, fold the entire lunch bag flat for convenient storage in the freezer. Freeze overnight (12 hours) and by morning, the walls of the bag will be completely frozen and ready to cool items for hours. Its ideal for people with special diets, food sensitivities or allergies The wide base of this lunch bag allows increased capacity and an exterior slip pocket stores napkins, utensils and personal items Easy-grip carry handles on this lunch bag are reinforced to handle heavy loads. The top zip closure locks in cool, dry air Proudly made by PackIt: creator of the ORIGINAL foldable, freezable lunch bag. Designed in California.