Harley Quinn, in her classic red and black, magically appears in vivid color when hot liquid is added to this DC Comics Justice League Chibi Harley Quinn Heat-Sensitive Morphing Mug. She looks cute, but don't let that fool you. She will use that mallet. If you want your mornings to start with a little mayhem and malice, with a side of adorable, this is the 11-ounce ceramic mug for you! Hand wash only. Not dishwasher safe. Do not microwave.