At a glance, YETI Rambler 10 oz. Mug might look like your everyday drinking vessel, but look again. Its loaded with top to bottom insulation to keep your coffee hot from the first pour to the last sip. And its a space saver. When the lid is removed, the built in grooves on the bottom help it stack perfectly on top of another one just like it. So whether youre storing it in the cabinets or packing it up for an adventure it one ups the average mug.