Almost every employer uses piss and your piss is already tainted. You could benefit with the assistance of a wizzinator, but any hardcore meat gazing piss test type knows what a real dick looks like. Flush your system with lots of water and one of those over the counter products you get in a head shop. Do yourself a favor and don't go smokin' more weed later that day, they may retest you.
Holds hands up - says failed piss test. Tried the take the balloon of good piss past the chemists. A) They give you like 30 seconds in the bathroom - not much time to play with getting things arranged. B) You need a certain amount of pee for their container and C) it HAS TO BE YOUR BODY TEMPERATURE.
k, I tried taping bag to leg - wasn't mine (was of a 12 yr old kid believe it or not) - ick - oh yeah can I state ICK FUCKING ICK, but I tried. It did not come up to temp, and oh gawd - it spilled down my leg (not my pee and now I have it running down my leg - sooo awesome) so I didn't have enough and so they sat me down outside the lab with a freaking water container so I could pee more so I could not pass. fuck. I ran out and said eff that job. First and last time I ever did that stuff.
Had a friend try the hair shampoo stuff as this company clipped hair samples. She failed.
Last I knew (I'm all clean now for many years yay!) coke can go 7 days but hair samples well way - blood is like 30 days, pot is 5-7 days unless blood test. Not sure if this is updated as I really am not involved in it anymore so I don't care --- unless they want a sample of hair that is from 7" down and in that case they can kiss my ass.
Good luck all!!