Harry Potter Transforming Thermal Mug 4 Pc Set

The world of Harry Potter comes alive with this 

"I Solemnly Swear...Mischief Managed" 

Transforming Thermal Mug. 

Fill this magical mug with something hot and it turns from "I Solemnly Swear That I Am Up To No Good" to "Mischief Managed." 

Key feature:

Turns from black to white/tan , completing the transformation.   

Size: 11-ounce mug

Not microwave safe

Not dishwasher safe. 

If interested in bulk, send message for more info.