This is the (currently $99 for a limited time) Intoxicated watch from TokyoFlash. It has a functional breathalyzer built in so you know how crunk you are. The unit reads blood alcohol content in 0.02% increments from 0 to 0.20%. For reference, 0.08% is the typical legal driving limit. The watch's face glows green when you're sober, yellow after blowing between 0.41% - 0.60%, red above that, and would explode if I ever got my lips close to the thing.
Hit the jump for several more shots and a video demo.