Cartoon My Little Pony Cute Horse Rainbow Dash Custom Morphing Coffee Mug Tea Cup 11 Oz Office Home Cup Made of 100% ceramic Size:11 OZ The morphing mug is just plain black in color when it's cold Mug will turn white and reveal your design only when filled with a hot beverage. Just add your coffee or tea, and watch your images come to life in vibrant color Printed two sizes