Material: Food Grade PP, 304 Stainless Steel, Silicone Rubber Seal Ring 

Safe and hygienic, heat insulated, and separate different foods without smell with this 3-Grid lunch box! It’s leak-proof and perfect for school! Easy to clean since can separate the stainless inner tank and the PP outer tank and cover. The PP box (without stainless) is temperature resistant up to 120 degrees celcius and can be heated in the microwave oven.