A go-to for coffee on the go. Fits in most cupholders. Any tumbler that's coming along for the ride needs to be tough enough to keep up. This fan-favorite Rambler 20 oz. Tumbler is made from durable stainless steel with double-wall vacuum insulation to protect the temp of your beverage at all costs. Like the entire Rambler Drinkware Family, the 20 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, please note- this magnet component is not leakproof and will not prevent spills. 18/8 Stainless Steel. Made with kitchen-grade stainless steel, so they re puncture and rust-resistant. Double-wall vacuum insulated. Keeps cold drinks cold and hot drinks hot until the last sip. Dishwasher Safe . Because no one needs more work to do. Magnets. How do they work? They make for easy opening and closing! Rescue Red