Ceramic Morphing Mug - Design For Teacher Cute Funny " Beast/Best English Teacher " Heat Color Changing Mug Magic Coffee/Tea Mug (11 Oz) - Best Gifts For Teachers ATTENTION - only purchase this Coffe Mug sold by "Beautiful Life Chioce" to guarantee authenticity. Capacity: 11 Ounce Material:100% Ceramic,Easy to clean,easy to carry Morphing:Just plain black in color when it's cold,mug will turn white and reveal Design only when filled with a hot beverage Our Custom Morphing Mug will be a good gift for your teachers