Willdoo Big-sized Cozy. Size: 12cm x 10.5cm x 3.9cm (when folded) Can be folded while attached. The inner fabric is also covered with aluminum. Astrofoil is used on the aluminum bottom to increase heat retention. *The folder cup in the photo is not included. There are slight individual differences in size. Shipping will be in simple packaging. If you want multiple items, please inquire in the comment section. *Combined purchase with the regular size is 1700 yen.