Kitchen-grade stainless steel with double-wall vacuum insulation will protect your drink at all costs. Like the entire Rambler Family, the 887 m Tumbler and whichever lid you put on it 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.