The world of Harry Potter comes alive with this "I Solemnly Swear...Mischief Managed" Transforming Thermal Mug. Fill this magical mug up with the hot and it turns from "I Solemnly Swear That I Am Up To No Good" to "Mischief Managed." In addition, the 11-ounce mug also also turns from black to white, completing the transformation. A WBshop.com online exclusive!
this mug is similar to the way I change when I'm filled with coffee. I WANT THIS!!!!