Size (W x H x D): 5.5 x 7.7 x 3.5 inches (14 x 19.5 x 9 cm); Material: Polyester / Aluminum sheet. Country of Origin: China; The interior is made of aluminum sheet, so it can keep heat or cold Wide opening for easy access Open and close zipper opens wide to the bottom, allowing you to smoothly insert and remove the mug. Comes with a strap belt, so it is easy to attach to strollers, etc.