Any tumbler that's coming along for the ride needs to be tough enough to keep up. Our Rambler® 20 oz. is made from durable stainless steel with double-wall vacuum insulation to protect your hot or cold beverage at all costs. Like the entire Rambler Family, the 20 oz. Tumbler and its lid are dishwasher-safe for easy cleaning. While the magnet on the included MagSlider™ Lid adds an additional barrier of protection for keeping drinks contained and preventing heat or cold from escaping, please note - this magnet component is not leakproof and will not prevent spills. Available in Stainless, Duracoat™ colors and Seasonal finishes. Layered with an advanced, oleophobic coating (which is science for: it’s fingerprint-proof), tested to the highest level of UV resistance, and equally as dishwasher safe, durable, and insulated as its predecessors.