[Material:] The 3-layer lunch box is made of high quality wheat straw + PP material, which is environmentally friendly. Wheat straw is a biodegradable material. Very healthy, non-toxic and durable, can be used for a long time; easy to clean: wash by hand or dishwasher [Knife and fork to carry:] You can use the knife and fork when assembling, and can be used as chopsticks when assembling. disassembly, which is very convenient [Suitable occasions:] The lunch box can be heated by a microwave oven; the lunch box heat resistance temperature: -20-120; it is an ideal choice for lunch in the office, school, picnic or other occasions. Three-layer compartment:Three-layer design allows you to separate food and store retain their own flavors. The spacer layer of the first layer is adjustable. [Size and capacity:] Equipped with two locks, which can tighten the whole lunch box to prevent food from leaking