When it comes to tumblers, none do it better than Yeti. From the toughest of cowboy camps to the most rugged of bike commutes, Yeti's Rambler Tumbler is ready for anything and everything you can throw at it. Built from durable 18/8 stainless steel, this 20oz double-wall vacuum insulated tumbler is not only dishwasher safe but also has a magslider lid for additional leak prevention. The lid also prevents heat or cold from leaking out to help keep your beverage just the way you like it.