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