Prank your teacher with this hilarious color changing coffee mug. One side shows World's Best Teacher, while the other side reads World's Worst Teacher.
Is your teacher left or right handed? Choose which hand your teacher holds their mug in so that the prank can work to its full effect.
· Heat activated, color changing mug
· Starts out black and changes color in 15-30 seconds when a hot beverage is added
· Available in 11 oz size
· Machine washable