I Smile Because You're My Sister-in-law - Funny Magic Morhping Mug 11oz Coffee Mugs Cool Unique Birthday or Christmas Gifts for Men and Women For Coffee,Tea And Hot Chocolate This is a morphing/color changing mug. Simple And Fashion Style Give You a Fresh Feeling. Holds 11 Ounce.Hand wash only.Can not be placed in the dishwasher. Just plain black in color then will turn white when add HOT beverages.