Most local headshops carry QuickFix. Its really the only surefire way to pass a piss test.

Any other way is pure guessing, as you dont know if it will work until after its done. Bring QuickFix, check to see that its the right temp before you pour it, and then leave with a smile on your face knowing you just passed your piss test.

Its so much easier then all the hassle one goes through to "detox" their body with water and pills. I dont have to drink excessive amounts of water, or take stuff to make my urine yellow or high in creatine... all I do is pour a little bottle in their little container, and walk out. I could have smoked a J just before I took the test, and I could still pass. (Not that I recommend doing that, smelling like pot is a good way to get someone to watch you piss)