This mug is loaded with top-to-bottom insulation to keep your coffee hot from the first pour to the last sip. And it's a space saver. When the lid is removed, the built-in grooves on the bottom help it nest perfectly with another just like it. Plus its got an ultra-durable ceramic lining for easier cleaning. Like all YETI(R) Rambler(R) Drinkware, the mug and lid are dishwasher safe. Like the entire Rambler(R) Drinkware Family, this stackable mug and included MagSlider(TM) Lid are dishwasher safe making them easy to clean. Each mug is sold separately. Please note: Do not place mug over external heat source or open flame. Vacuum seal or other damage may occur. This magnet slider is not leakproof and will not prevent spills. Features STACKABLE BASE: Remove the lid and nest your Rambler(R) 10 oz. Mugs to save space 18/8 STAINLESS STEEL : Made with kitchen grade stainless steel, so they're puncture and rust resistant DOUBLE-WALL VACUUM INSULATION : Keeps cold drinks cold and hot drinks hot until the last sip 360-DEGREE WELDED HANDLE: For a firm grip on your beverage that won't break if it hits the rocks DISHWASHER SAFE : Because no one needs more work to do Lined with DuraSip(TM) Ceramic Lining for easy cleaning and added durability Capacity: 10 oz.