Ice No Longer Needed! PackIt's gel insulated, FREEZABLE Mini Cooler snack packs are all lined with a non toxic eco gel liner. The perfect size for small snacks, baby bottles or drinks on the go, even perishables such as yogurt stay cold for hours! Simply fold the bags and store them in the freezer until needed, at least 12 hours or until frozen solid, pull them out and PackIt and GO!