Come and see our amazing products. The multi-layer stainless steel insulated lunch box uses pp material. Its inner layer is made of stainless steel, which can effectively keep warm for 24 hours, or it can be disassembled and heated. Its lid can store utensils or used as a mobile phone holder. Here is a single-layer insulated lunch box, its size is about 5.91x5.91x3.94 inches. We also provide two-layer, three-layer and four-layer insulated lunch boxes. The prices are different. Please contact us for an accurate quotation and size. 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.