A go-to for coffee on the go. Any tumbler that's coming along for the ride needs to be tough enough to keep up. Our fan-favorite Rambler 20oz. Tumbler is made from durable stainless steel with double-wall vacuum insulation to protect the temp of your beverage at all costs. Like the entire Rambler Drinkware Family, the 20oz. Tumbler and MagSlider Lid are dishwasher-safe for easy cleaning. The magnet on the included MagSlide Lid adds an additional barrier of protection for keeping drinks contained and preventing heat or cold from escaping.