YETI® Rambler 20 The 20-oz. YETI® Rambler is the perfect device for keeping your beverages at the right temperature. This cup has a double-wall vacuum for insulation, an 18/8 stainless steel body and the YETI® DuraCoat™ Color to fit your style, as well as a No Sweat® Design for a secure grip, the famous Certified Angus Beef ® brand logo and the new MagSlider Lid, so you can enjoy your drinks without splashes. As a bonus, it is dishwasher safe and shatter resistant.