These Yeti Ramblers can be used for anything. After all, any tumbler that's coming along for the ride needs to be tough enough to keep up. The Rambler® 20oz. is made from durable stainless steel with double-wall vacuum insulation to protect your hot or cold beverage at all costs for hours on end. Like the entire Rambler Family, the 20oz. Tumbler and its lid are dishwasher-safe for easy cleaning. The magnet on the included MagSlider™ Lid adds an additional barrier of protection for preventing heat or cold from escaping.