Double Layers Stainless Steel 304 Lunch Box With Insulation Bag Leak-Proof Thermal Bento Box Adult Student Food Container1000ml Double Layers Stainless Steel 304 Lunch Box With Insulation Bag Leak-Proof Thermal Bento Box Adult Student Food ContainerMaterial: stainless steel 304, food grade PP, silicone;Color:Black,Blue,Pink,Green;Capacity:1000ml;Size:20.5*14*9cm;Weight:about 440g;Keep warm time:Single Lunch Box = About 3 Hours.Lunch Box With Bag = About 6 Hours.