The Mammoth 20oz Rover tumbler is designed for those who love to take their beverages on the go. Its double-wall vacuum insulation keeps your drinks at the perfect temperature without condensation. Crafted from 18/8 kitchen-grade stainless steel, the Rover is durable, easy to clean and wont retain flavors. With a clear lid, rubber gasket, and stopper, your beverage stays secure and maintains its temperature longer.