Breathalyzer Wrist Watch
A breathalyzer in a watch? What will they think of next. This high-tech James Bond-y type wristwatch measures your blood alcohol content, tells time, and is extremely discreet. Worried you've been drinking too much? Just blow on your watch and you'll soon know if you're too impaired to drive, or to ask that person out at the bar.
This is a good guide to keep track of how many drinks you've had. You can create a profile for yourself listing your stats like height and weight and it takes it from there.
This little gadget is a torch lighter, key chain, and a Alcohol breath tester, all in one. Very handy and useful. Comes in use in those time where your not exactly sure if you should drive after having a "couple" drinks.