When it comes to tumblers, durability is key for the journey ahead. Yeti's beloved Rambler 20 oz. Tumbler is crafted from robust stainless steel, featuring double-wall vacuum insulation to safeguard your beverage's temperature. As part of the Rambler Drinkware Family, both the tumbler and the MagSlider Lid are dishwasher-safe for effortless cleaning. The MagSlider Lid, equipped with a magnet, provides an extra layer of protection, though it's important to note that while it helps contain spills, it's not leakproof.  Weight 408 g Dimensions 8.9 x 16.8 cm (3.5" x 6.6") Materials Stainless steel