Published Wednesday by the American Chemical Society (ACS), the study from Korean researchers developed a multicoloured temporary tattoo that reacts to the presence of GHB, a compound described as “commonly associated with drug-facilitated sexual assault.”
According to the study, the chemicals in the tattoo can detect concentrations of GHB in beer, liquor or coffee, changing colour from yellow to red in order to alert the wearer that their beverage may have been spiked.
“In practice, a wearer could dip a finger into a beverage, touch the drop to the sticker and see the result almost immediately,” the release reads.
The newly developed tattoos not only allow the users to test their drinks discreetly, but also act far faster than some older tests, delivering results in less than a second, rather than minutes.
Researchers also say the results last for up to a month, which can help preserve evidence of suspected tampering.
Also direct link to ACS
https://www.acs.org/pressroom/presspacs/2025/july/this-temporary-tattoo-could-detect-an-unwanted-drug-in-your-drink.html
I don't find it bad product, but rather discreet.
It's not though. Sticking your finger in your drink or pouring it onto yourself is not any more subtle than doing that with or on a test strip, and furthermore, this is a much more expensive and convoluted alternative to the test strip which can't be ignored.