Sweet Design For Grandma Only the BEST MOMS get promoted to Grandma Heat Sensitive Color Changing Mug Custom Ceramic Morphing Coffee/Tea Cup Mug 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