This 100% Waterproof Lunch Tote is double layers. Besides the outer insulated neoprene material, the inner PEC also can keep the food cold or hot for a long time. You can freeze the lunch holder in the refrigerator, just take it out when you need carry food out. The recycled lunch bags are multifunctional, they also can be used as shooping bags, take out bags, travelling bags, picnic bags and so on.