I'VE BEEN DRINKING, so see if you can tell in the writing of this blurb about BACTRACK ($80, Bactrack.com). The sleek gizmo is slimmer than a cellphone and more fun than a BlackBerry.
Here's the deal: You have to wait 20 minutes after eating or drinking anything to play (which is, admittedly, a buzz kill). Then you press the power button, let the screen light up and begin a countdown from 50. At about 10, start inhaling a big breath and, when it hits zero, breathe out for five seconds (not in a blow-out-the-candles way, but so that you make the sound "hhhhaaa").
Either through technology or magic (depending on how many glasses you've had), it displays your blood alcohol content. After a teensy bit of vodka and some sauvignon blanc, I'm at .02, which the enclosed booklet correctly tells me is accompanied by slight euphoria and loss of shyness.
Image courtesy BACTRACK