In many cases, the ones who are on stage at a karaoke bar are already a couple pints deep, which is why, in an effort to stop patrons from drinking and driving, Bar Aurora and Bateco Ferraz combined forces to bring bar-goers the microphone breathalyzer.

In an awareness campaign for the product put together by Ogilvy Brazil, unsuspecting drunkards are shown belting out classic, feel-good tunes, only to be scored not by their tone (because really, how is it fair to judge anybody's singing voice at a bar?) but by a blood alcohol content percentage. Singers who have exceeded the legal limit are reminded that they may not get behind the wheel.

The microphone breathalyzer is a discreet and practical way to give those who have had a few too many drinks a public wake up call to not get drunk and drive.