Come and see our amazing products. The double-layer insulated lunch box for students is made of Oxford cloth and aluminum foil. This material is very waterproof. The lunch bag is made of thermal insulation material, which can keep food and beverages cool or warm for more than 5 hours. Can hold all kinds of food. Its size is approximately 9.06x5.91x9.45 inches. In addition, we welcome customized logos, please contact us. Pls confirm with us about the packing info, stock color and exact production time before placing your order.