The Rambler 20 oz. is made from durable stainless steel with double-wall vacuum insulation to protect your hot or cold beverage at all costsSpecifications and Features: These Ramblers come standard with the YETI MagSlider Lid, the only drink lid that uses the power of magnets to keep your water, beer, or favorite drink on lock While the MagSlider Lid adds a barrier of protection for keeping drinks contained and preventing heat or cold from escaping, Please Note - The MagSlider Lid is not leakproof and will not prevent spills YETI Ramblers are dishwasher safe, and have a No Sweat Design to make sure your hands stay dry. The tough Duracoat coating on the colored tumblers won't crack, peel or fade The YETI 20 oz Rambler Tumbler stands 6 7/8 in high and has a lip diameter of 3 1/2 in. All YETI 20 oz. Tumblers are sized to fit in standard sized cup holders