The Rambler™ 30 oz is the tumbler that gets you through the day. Your morning brew will stays hot or your iced coffee will stay cold, so take your time. Kitchen-grade stainless steel with double wall vacuum insulation will protect your drink a tall 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, this magnet component is not leak-proof and will not prevent spills.