I was required to take a drug test before starting a job. I'm not a heavy smoker but I probably had some opiates metabolites floating around in my bladder as well. I used Magnum synthetic urine. I had 1 hour from my interview to drive down the road to pass my test...dilution wasnt going to work. I literally bought the synthetic urine a block away from test site, put it in my microwave for 10 seconds which brought the squirt bottle to 100 degrees. I let it cool to 97 and strapped on the heating pad that came with it (basically a hot hands container) stuffed it into me britches and drove to the facility with 15 minutes left until they closed. the temperature strip said 96 when I put it in the cup ( it was unsupervised but i could have easily pulled it off a supervised test with the squirt bottle) the liquid smelled like windex and was completely clear....so i had my doubts. 2 days later I got call saying everything was ok. So its called Magnum synthetic Unisex Urine. I highly recommend it, I payed 53 dollars at a headshop. Hope this helps mate!