Days on the dock are made better with the Rambler™ 30 oz. Tumbler. It’ll 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. It also comes standard with the YETI MagSlider™ Lid, the only slider lid that uses magnets to keep your water, beer, or favorite drink on lock.