I don't know about all the other ideas you've been told but I substitute all the time and when you say your not sure if you can, no matter where you take a employment test you go in the bathroom alone and come out with a cup of piss.

Search for quick fix and substitution here and you will heat it up, attach a heating pad, put it in the pouch of your fruit of the looms, go in the bathroom and pour it in the cup and with a search and practice you will know how to check temperature and it could not be easier.
jeffman Reviewed by jeffman on . Upcoming Urine Test - help. . . I have recently been offered a promotion at work, and luckily my boss is cool enough to give me time to clean up before he promotes me (and sends me for testing). I actually stopped smoking around the 14th-15th of this month (july) in order to prepare for this drug test after smoking roughly 7 grams of mid grade bud in 2 days (roughly 3.5 grams a day) for the last 5-6 months consistently. I lit up tonight and smoked a joint to relieve some stress, and am worried i wont be clean in time. Rating: 5