Pull an all-nighter with some steaming black coffee stored in the Kambukka Olympus Double-Walled Stainless Steel Thermal Mug with Switch Lid Silk Blue. Built with a double-walled vacuum body, this mug keeps the drinks hot for up to 6 hours and cool for up to 11 hours. In addition, it features a switch lid that enables convenient sipping and pouring.-Black-Size (7.4x7x13.4)