Unemployed Philosophers Guild The Cheshire Cat Mug celebrates one of our favorite Wonderland characters. Pour any hot liquid into this mug and the cat disappears, leaving only his famous grin! • 10 oz. Ceramic coffee cup with a comfortable handle. • All of our disappearing mugs come in a beautifully designed, colorful box. • Heat activated color changing mugs are microwave safe, but not dishwasher safe. Hand wash only. Don't soak. • UPG is a novelty gift company specializing in smart and funny gifts. Check out our shop for all types of quirky fun stuff!