putting on a condom is bringing you an indicator that tells you if your alcohol is the real thing or not: Rotgutonix.
Okay, not a huge problem for us in the U.S., but there are myriad stories in Europe of people making designer imposters using very low-quality grain alcohols. At best, this stuff will make you sick, at worst it'll cause blindness and death OR WORSE!
This little gadget is in concept phase but can test if you have the real Johnny Walker, JB, DYC, Pampero, Brugal and Havana. More alcohols are to come and it will cover mostly the clear ones and some whisk(e)ys.