* Upgrading from 2020.5.20 and adding <aluminum foil cover>, the insulation effect is better. Most of the materials of commercially available thermal insulation lunch bags are plastic. We designed this thermal insulation lunch box dedicated for thermal insulation lunch boxes, using Taiwanese printed cloth plus cotton spreading and double-layer tin foil insulation layer (commercially available thermal insulation bags are single (Tin foil only), the whole is the concept of helping the bento box wrap a layer of quilt with heat insulation. Different from ordinary commercial heat-preserving bento bags, this bag has an extra layer of cloth, wrapped in tin foil cloth, so it can also be used as a small carry-on bag and can be used for anything. / Size / The internal space is about 18.5cm wide, 17cm high, 14.5cm at the bottom, 36cm long tote bag, the more the size of the insulation bag and the lunch box, the better the insulation effect / Material / In the selection of materials, we hope that the less the material of the bento bag, the better the plastic, so the following materials are used: 100% cotton and linen table cloth, polyester cotton spread cotton, double-layer tin foil bubble cloth, cotton blended lining , Cotton blended handle, wax rope, wrap rope buckle / Use and maintenance methods / Please wash by hand as much as possible, if you want to machine wash, please wrap with a laundry bag. Do not iron, it will damage the insulation bubble layer.