This pouch uses insulated fabric on the inside. It's large enough to comfortably hold two ice rings (L size, 18cm x 16cm). Use it to keep chocolates, pouches, and juice packs cold when you're on the go, along with ice packs. It will keep things cold for a long time. You can also put in frozen pouches or jelly! The pattern will vary for each item depending on where the fabric is cut. Size: Top width: 21cm Bottom width: 15.5cm Height: 18cm Width: 5cm Fabric: Outer: Cotton Inner: Insulated fabric You can choose your favorite fabric and have it custom-made to order. Size changes are also possible. If you need tracking and insurance, please let me know before purchasing. It can be added for an additional 100 yen.