This is the only lunch box where the inside of the lunch box is completely made of 304 stainless steel. Even the lid of the lunch box has steel at the bottom with insulation. This is the only lunch box where the food remains hot for up to 6 hours. The lunch box has a 4-side clip-lock lid and stainless-steel inside to keep food fresh and safe. The lunch box is easy to wash and clean and features Disney and Marvel cartoon design on the top. The lunch box comes along with one small container with a spoon. The lunch box for kids is ideal for daily use and holds just the right amount of food for lunch. Fits easily into a backpack or lunch bag. The outer body is made of PP plastic (non-toxic and BPA free) and has a 304 stainless steel wall inside. This bento is microwave and dishwasher safe and is easy to clean. The 4-side clip locking system adds to the beauty of the lunch box and makes it airtight and leak-proof as well. Because of the outer plastic body, carrying hot food is also easier.