These is the Rorschach inkblot color-changing coffee mug. It's currently only available in the design seen here (I see a devil face, then a different devil face), and costs $25. Still, that's a small price to pay to get to stand around the break room analyzing your coworkers. Hey Phil -- what do you see in my mug? "Looks like a bourbon and Coke." Dammit you shithead you know what I meant.
Keep going for a couple more shots and the whole video.
Thanks to Dan The Man, who agrees the best coffee mugs are those ones with the big 3-D breasts on the side they sell at gift shops in beach towns when you're on vacation.