Drink driving is obviously super dumb, but it can sometimes be difficult to tell what kind of effect a beer has had on your body. Fortunately, Tokyoflash's latest watch straps a breathalyser to your wrist so you can keep a check on things.
Blow into the sensor housed on the side of the watch and the LCD will change colour to reflect your alcohol intake: green is sober, red is well over the limit. There's even a little on-board game to check your reactions.
Like most Tokyoflash watches the time is particularly tricky to read — but maybe that's another mechanism through which you can check your sobriety. For the next 48 hours the watch will sell for £64; you can buy it direct from Tokyoflash. [Tokyoflash via Engadget]