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!