PackIt is the original freezable bag with a patented, built-in cooling technology that keeps anything you pack cooler, longer - up to 10 hours! The freezable gel is permanently built into the walls of the bag so you’ll never need to buy separate ice packs or gel packs again! Keeps perishable groceries fresh and safe while you're on the go. The shoulder tote has comfortable straps and a rectangular flat base to fit various container sizes and bottles. Simply flatten the PackIt Freezable Grocery bag and store it in the freezer overnight (12 hours). In the morning, the walls of the bag will be completely frozen and the bag ready for filling. The zippered closure locks in cool, dry air so it keeps food chilled all day.