Fold, freeze, pack and go! Simple to use: empty, collapse and freeze the entire lunch bag overnight (12 hours). By morning, the walls of the bag will be completely frozen and ready to pack. This lunch bag keeps food cooler longer, which means you can pack healthier foods that would spoil in other lunch boxes such as: prepared meals, salads, fruits, meats, and veggies. The Lunch Bag features a zip top closure to lock in cool, dry air. A buckle handle on the back of the bag clips onto totes, backpacks and strollers for hands-free convenience. This soft lunch bag is made from nontoxic gel. Like all Packit products, the Lunch Bag is made from PVC free, BPA free, phthalate, and lead free materials. Cleaning is easy: wipe thoroughly or hand wash the interior and spot clean exterior; allow bag to dry completely before freezing.