You can touch your nose; you can pretty much walk a straight line; you can say the alphabet backward; you can… crash your car into a phone pole. Maybe you’ve only had a couple drinks, but once you’ve had anything at all, you’re in no position to judge your sobriety. So, if you must drive, at least keep one of these on hand. The Digital Keychain Breath Alcohol Detector tests your breath alcohol content with the push of a button. So it’s totally easy to use when you’re wasted.