This handy 12 Oz. self-stirring coffee mug keeps your hot drink frothy and mixed, while keeping stir sticks out of landfills. Attributes include quality double-wall stainless steel and a 3,000 RPM motor that efficiently and quietly blends your hot beverage. Features a splash-proof lid with viewing window, which can also be used as an impromptu coaster. The large imprint area is the perfect promotional tool that will display your logo or message. The price doesn't include the batteries .