Gear up with an all day friendly essential. The Mammoth® 20oz Rover is a steady, dependable companion. Forged from resilient 18/8 kitchen-grade stainless steel, it transitions smoothly from a bustling morning commute to a quiet conference table. Reliable double-wall vacuum insulation traps the perfect temperature for hours, keeping the exterior completely free of condensation. A crystal clear lid, secured by a tight rubber gasket and rubber stopper, ensures every drop stays safe throughout the busy workday. To ensure the long-term brilliance of the finish and keep it pristine for years of use, hand-washing is recommended.