I handmade a lunch bag with a zipper. I think it's easy to use with a lining of thermal insulation sheet. It fits a lunch box and a PET bottle! Outer fabric: KOKKA "Cats and Friends in a Fairy Tale Land" - Medium-thick fusible interfacing is applied. It's a bit sturdy. Inner fabric: 4-layer aluminum thermal insulation sheet With mesh, it's tear-resistant and durable. Uses a 25cm zipper. Height: 21cm Top width: Approximately 26cm Gusset: Approximately 10cm Handle: Approximately 30cm You can wash it, but we recommend putting it in a net or washing it gently by hand. Ironing and tumble drying are not allowed. There are no pockets. Since it is handmade, please understand that there may be some distortion or stitching errors. The actual color may differ from the photos. It will be folded for packaging. Thank you. Lunch bag Cooler bag Thermal bag Cat Fish Sea Cat Animal