PackIt Freezable Sandwich Cooler Bag with Zip Closure, Ziggy PackIt freezable Sandwich Bag is designed to keep contents cooler, longer: up to 4 hours Features a patented freezable gel permanently built into liner, no need for ice or gel packs, simply freeze your PackIt overnight Zip closure to lock in cold, dry air; print created by design house French Bull Perfect all types of sandwiches and snacks Made from food-safe, nontoxic poly canvas; PVC, BPA, phthalate, lead free; Simple Care: interior wipes clean, spot clean exterior