The Rambler® 30 oz is the tumbler that gets you through the day. Your morning brew stays hot and your iced coffee will stay cold so take your time. Kitchen-grade stainless steel with double-wall vacuum insulation will protect your drink at all costs. Like the entire Rambler Family, the 30 oz 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 leak-proof and will not prevent spills.