You’re probably familiar with iPod accessories such as fashion slipcases, custom skins and docking stations. But, now, there’s a new portable device that’s perfect for holiday party-goers.

The iBreath from David Steele Industries turns any current-model iPod (except Nanos) or iPhone into a convenient pocket breathalizer. The device is totally self-sufficient, with its own mini LCD readout screen, requiring only power from the iPod or iPhone. The iBreath breathalyzer also comes with a 12V car-power adapter cord (if you don’t have an iPod or iPhone) and a USB cable.

You just plug the iBreath into the iPod or iPhone’s base socket and exhale into the ‘blow wand’ for a minimum of five seconds. A few seconds later, you’ll get a digital readout of your blood alcohol content. If you blow over your local legal limit, you can set a timer to remind you to try again, anywhere from one minute to eight hours later.

The international anti-DUI organization Mothers Against Drunk Driving (MADD) initially criticised the iBreath on the grounds that it might be used at teenage drinking parties to see who could run up the highest blood alcohol content. However, the device does not display readings above 0.100 percent blood alcohol, making such competitions pointless.

The iBreath is just (US)$79 direct from the manufacturer, whose Web site suggests it, “makes a great gift!”