Tailgates are made better with the Rambler™ 30 oz. Tumbler. Your personal hydration powers station will keep your dinnertime drink cool well past sundown or your coffee piping hot throughout the morning. The Rambler 30 oz. Tumbler is made of 18/8 kitchen-grade stainless steel, has double-wall vacuum insulation, and No Sweat™ Design. Dishwasher Safe.