Color Changing Prank Mug by Reefmonkey "I Stole this Cup from the Breakroom"

Have someone that's just helping themselves to your cup or any random cup they find? This high quality mug stays a dark gray/black color when cold but once the heat soaks in, the cup is as shown. Trap an unsuspecting cup theif, play a prank, or just fill your cupboard with mugs that you know people can't walk off with. :) Bring a sense of magic and wonder to your breakfast table with this new age mug! Changing color right before your eyes it brings a sense of fun and curiosity to those around you. Coming in 11oz and 15oz sizes, this mug is the perfect way to enjoy favorite warm holiday drinks in style! .: White ceramic .: 11 oz. (0.33 l) and 15 oz. (0.44 l) .: Rounded corners .: C-handle