YiKaiSu Waterproof Round Lunch Box Cartoon Lunch Bag Picnic Bag Cold Pack Cooler Bag Insulation bags Sponge Bob Insulation, waterproof Fashionable and large capacity Storage convenient and easy to clean ( outer use soap water cleaning, the inner need to swab with wet cloth.) Reusable; Reduce waste; Fashionable alternative to plastic or paper; Practical way to carry meals or snacks and more. It can be used as lunch bag, picnic bag, sundry bag or shopping bag(have heat preservation, cold, fresh function. When you go to the supermarket, it also can be used to pack frozen food, hot pot dishes, frozen drinks, ice cream, dairy products, etc.)