Magical things happen when you drink from a Color Changing Unicorn Mug. When you fill the mug up with hot liquid, the unicorn's mane changes from a solid color to a rainbow of colors. Here's how it works: The mane on the side of the mug is made from color changing paint that will go from all black to a flurry of majestic colors once you add in a hot liquid. After you pour in your hot coffee or tea, a rainbow stream will slowly make its way up the mane all the way to the top. Make every morning cup of coffee a rainbow filled cup of sparkle juice with this Color Changing Unicorn Mug! Details Volume: 9 oz (250 ml) Dimensions: 5.91 x 3.54 x 4.13 inch (15 x 9 x 10.5 cm) Not microwave safe Not dishwasher safe Package includes: 1 x Color Changing Unicorn Mug