This mug is loaded with top-to-bottom insulation to keep your coffee hot from the first pout 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. Like the entire Rambler Drinkware Family, this stackable mug and included MagSlider 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. Details DuraSip Ceramic Lining: Savour every sip with a no-mess interior made for easy clean ups. Stackable: Made to stack when you're strapped for space. Double-Wall: Keeps cold drinks cold and hot drinks hot until the last sip. 360-Degree Welded Handle: For a firm grip on your favourite beverage that won't break if it hits the rocks. Dishwasher Safe: Because no one needs more work to do.