Made of Food-grade Stainless Steel Metal. the Capacity 6.5oz (200ml), is Appropriate for a Cup of Drink. the Mug is Double Walled Vacuum Thermal Insulated & Hence Can Keep Drink Hot & Cool. with It You Can Always Enjoy the Hot & Cool Drink at Home, at Work or in Any Other Place. the Small Size Makes It Easily Held in Hand or Put into a Bag. You Can be Worry-free to Use the Cup for Any Kind of Drink on the Go, Like Coffee, Tea, Wine, Whisky, Beer, Water, Milk, Etc.