Portable Lunch Box for Kids Students Stainless Steel Thermal Lunchbox with Spoons and Chopsticks Food Container Bento Box. The inside of the lunch box is made of high-quality food-grade 304 stainless steel, which is corrosion-resistant and never rusted, has no peculiar smell and is easy to clean, so it can be used repeatedly. The exterior and partitions are made of food grade PP plastic. The lunch box is designed with 4 or 5 compartments, which can prevent different foods from being mixed, so as to maintain the original taste of the food. The lunch box compartment includes a separate stainless steel soup bowl for storing soup or serving as a sauce bowl. The 360 degrees silicone sealing ring of the lunch box lid also has a four-side snap design, and the double-sealing design can lock the freshness and prevent leakage. The built-in cutlery box design on the lid of the lunch box can not only store chopsticks and spoons, but also can be used as a mobile phone holder, so that you can eat while watching dramas. The portable lunch box supports microwave heating, but please note: When microwave, you need to open the vent valve on the lid and the buckles around the lid. The lunch box must be heated with the outer PP shell, and the stainless steel liner compartment cannot be microwaved directly. The stainless steel inner tank can be separated, and the boiling water can be injected to warm the food, which has a heat preservation effect.