This stackable mug features top-to-bottom insulation to keep your coffee hot from the first pour to the last sip. Furthermore, it's dishwasher-proof. Please note that the smooth-sliding magnet component is not leakproof and will not prevent spills. YETI makes gear that’s built for the wild. The brand was conceived to build the cooler that could stand up to your adventures, and still bring cold drinks to the cleaning table or campfire afterwards.