Food Material: The thermal lunch is made of food 18/8 stainless steel internal layer, PU material insulation middle layer and High Quality plastic PP external shell. It is easy to clean and reusable, durable, BPA Induction Cooker & Microwave Safe: The bento lunch is safe for microwave heating, plus the stainless steel inner layer can be removed separately for induction heating. Both ways refer to the operation in the pictures Separate Food : 4 bento for adult can be stored separately according to your preferences and needs,such as main dish; side dish; dessert or snack. Avoid mixing food with each other to ensure the original taste of food Sealed and leak-proof design: Each bento lunch has a built-in sealing silicone ring that prevents the spillage of sauces and soups. Each bento has silicone vents on the top, open the vents before opening, making it easier to open Bento Lunch Set: Bento adult lunch set include 4 stainless steel lunch boxes , 1 insulated lunch bag, 1 chopsticks and spoon. It is conveniently to carry your delicious lunch everywhere, for office; camping; picnic; traveling; etc Notice: THIS IS NOT INTENDED FOR USE BY CHILDREN 12 AND UNDER