The MagTwist™ Lid puts a RovR spin on drinkware. This 16 oz. vacuum-sealed vessel keeps your cold drinks cold, or hot drinks hot for extended periods of time. The can shape fits perfectly in your hand for that feel-good drinking experience, reminiscent of those good ol’ college days. The MagTwist™ Lid opens wide for an adult-worthy drinking experience. No more glugging, a lot more chugging!Our 16 oz. Tallboy with MagTwist™ Lid is made of double-wall kitchen-grade stainless steel. They are dishwasher safe and BPA free. Capacity: 16 oz.. Vacuum-sealed vessel. MagTwist™ Lid. Double-wall kitchen-grade stainless stee . Dishwasher safe. BPA free.