Insulated Lunch Bag with Side Mesh Pocket 6.3L Portable Lunch Box Waterresistant Leakproof Cool Bag for Outdoor Beach Bento Pack. The lunch bag liner is made of aluminum foil material, which has good insulation and cooling effects. The exterior is made of Oxford cloth material, which has good waterproof effect. Side mesh pockets and front pockets are designed for easy classification and storage. 6.3L capacity design, convenient for carrying more food bento boxes, etc.