Even though your hardcore party friends might see them as little more than a buzzkill, the world of home breathalyzers has been rapidly expanding—over $800 million in sales last year in the United States alone. But who wants to go to the trouble of carrying one around on their keychain when you could just have a reminder of your BAC right on your body?
We’ve already seen the FitBit-like contraption that you can strap to your wrist, but researchers at the University of California San Diego led by professor Joseph Wang have taken the idea to it’s next logical and terrifying step, developing a temporary tattoo to let you know if you’re too drunk. The entire setup consists of the temporary tattoo, which electrochemically detects alcohol levels through your sweat, and a flexible circuit board, that attaches to the tattoo with a magnet and can communicate to Bluetooth devices.
The addition of the circuit board means this might not be as fashionable as the henna tats you got at Coachella when you were 23, but it’s at least as useful.