Add a little magic to the morning rituals with one of these custom 11 oz Magic Mugs! Thanks to special thermal coating, what appears to be an ordinary black ceramic mug, slowly begins to reveal a hidden design or print of your choice when you fill the mug with hot liquid. Personalized color-changing mugs are a great drinkware add for your print-on-demand business and a popular novelty gift. Check out our entire drinkware line and complete your ceramic store assortment with our Metallic Mugs, Accent Mugs and Latte Mugs.