DrinkMate is a portable breathalyzer that you plug into your Android phone, that in conjunction with its app, accurately displays your current blood alcohol level when you blow for four seconds into the device.
The makers of DrinkMate have dubbed it the "smallest breathalyzer in the world," and measuring only 1.8-inches long, and 0.62-inches in diameter, it's easy to see why. DrinkMate also has no internal battery (it's powered by your phone), allowing it to weigh no more than 0.2 ounces. With the DrinkMate app you will be able to share your blood alcohol content rating, in order to leverage the power of peer pressure to force you to make smart decisions.
DrinkMate has already surpassed its KickStarter goal, and is expecting to ship on the first of December.
Miniscule Smartphone Breathalyzers
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Purse-Size Booze Detector
Bad Breath Detectors