I've used it. It's what the local head shop sells, I've passed 2 or 3 piss tests with it, I just stuff it in my bra an hour before for temperature reasons.
I had a hiring event for Amazon and came prepared with fake urine stuffed under my boob because that's typically how I get my employment but they switched it up on me this time with a saliva test. I smoked right before I left my house, and took the test about an hour and a half later but had too...