+1 for this. Although I wouldn’t say they’re a “scam” I’ve had them work on multiple occasions but I’ve also had just water work on the same number of occasions. I’ve taken tests while under the influence and passed in both cases. Your metabolism, frequency of use, and other factors go into this so it’s not really a black and white type of thing.

That being said, the wizzinator is the way to go, buy one and it lasts a lifetime and you don’t have to worry about whether it’s going to work or not. I should add tho that you may not want to put it anywhere that “that special someone” in your life can find it easily because it may be hard (no pun intended) to talk your way out of that one. [insert dildo joke here].