?【PREMIUM MATERIAL】 : This inner wall of bento boxes for kids lunches is made of SS304 food-grade stainless steel , BPA-free, and the exterior of bento lunch box is made of food-grade plastic,safe and secure. ?【 ANTI-LEAKAGE DESIGN】 : This silicone seal of heated lunch boxes for adults is designed to seal and prevent leakage to ensure freshness，The layers of the insulated lunch box are tightly connected to prevent the soup and odor from overflowing. ?【FINE WORKMANSHIP】: The edges and corners are polished very smoothly and delicately, without burrs, and will not scratch your hands. The sealing buckle has fine workmanship and can prevent the soup from leaking. ?【CONVENIENT HEATING】: There are two way to heat the kids bento box the first one is pour hot water into the plastic shell for heating, the second is removed the lids of heated lunch box and put it into microwave for heating ( PS:Do not heat the stainless steel plate alone) ?【FEATURES】: Stylish appearance, multi-functional design, can be used for microwave heating. You can give it as a gift to your friends and relatives, I believe they will like it very much.