This is an insulated case for frozen pouch drinks. Adding a cold pack will keep them colder for longer. The inside is made of aluminum foil. You can drink directly from the pouch while it's in the case, as the drinking spout can be accessed through the hole between the lid and the body. Size: Length: 16.5cm Width: 15cm Please allow for slight variations. For personal use, I made large sizes for Aquarius and small sizes for Coolish. This is a handmade item, so please understand that there may be imperfections such as warping, wrinkles, and uneven stitching. Bundle discounts available, please inquire in the comments: 1 item: As is 2 items: ¥100 off 3 items: ¥200 off Each additional item: -¥100 Fabric has been pre-washed. Please do not iron or wash.