Novel Fashion Romantic "My heart Belongs to a HOT FIREFIGHTER" 11 Ounces Heat Sensitive Color Changing Custom Ceramic Morphing Coffee/Tea Mug - Best Gift Choice For Birthday/Valentine's Day/Christmas/New Year/Self Use Special Magic Morphing Ceramic Mug Size: 11 Ounce Work with coffee,tea,milk at office or party,coffee house,house home Easy to clean,It has a handle that is easy to hold Just plain black in color when it's cold,turn white and reveal design only when filled with a hot beverage