Whether keeping coffee hot on the winter commute, or iced tea cold during a summer escape, Yeti's 30 oz. Rambler® Tumbler is tough enough to keep up. Durable stainless steel with double-wall vacuum insulation maintains beverage temperature while the MagSlider™ Lid protects contents and keeps heat or cold from escaping. Both the tumbler and its lid are dishwasher safe for hassle-free cleaning. Please note—the magnet lid is not leakproof and will not prevent spills.