These lids provide the perfect protection for food and fruit on trips, camping, cooking activities, barbecues, picnics or in the home kitchen on pots, plates and pots, any open drinks, snack and fruit only, but they also keep salads cold and hot food warm for longer . Foldable design, does not occupy space when storing. Protect foods from mosquitoes and flies. The inner part is made of aluminum foil to maintain heat, easy to clean and preserve.