Yeti Black Rambler 30 oz Tumblers With Durocoat Finish & Magider Lids Set2 New The YETI Rambler family is tough as hell, and will keep your drinks as cold (or hot) as science allows. With stainless steel construction, double-wall vacuum insulation, and No Sweat Design, they’re perfect for on-the-move adventures in the backcountry and long days on the water alike. Plus they’re dishwasher safe. From insulated Bottles and Tumblers to Mugs and Jugs, get the Rambler Drinkware that suits your next day out.