Hey guys, this is my first post on here and I've tried to use the search feature and found a lot of related topics but a lot of the scenarios where different than mine so I thought I'd make a new one. Here's some background information about me(not sure if it really matters because I'm trying to just substitute but if you guys think detoxing might be a better method please enlighten me). I'm 5'11", 175 lbs, average metabolism, been smoking pretty heavy for like the past two months (about a quarter a week of some highs) and I do not work out and drug test is in 4 days. My employer is requesting an eCup Instant Test. Here is my story (if you don't care then please just go to the bottom of my post to see the cliffnotes/questions I have). So long story short I got some urine from a friend [used this method in the past twice successfully] however due to my ignorance I got it probably 5 days before the test and didn't refrigerate it so when I went to transfer the urine on Sunday to a travel sized shampoo bottle (test was this past Monday) it was a really brown murky color and very obvious that it wasn't normal urine. So as a last resort (couldn't get any more from my friend) I went to a smoke shop that claimed they had quick fix but when I got there (got there around 5:45ish and all head shops close around 6 around here, my mistake again I know) all they had something called Magnum synthetic urine and I had no choice but to get it. I went in Monday and had it at the right temperature (originally heated it to 100 degree but it some how fell to 92 at the collection time) but I guess that was still fine. My current situation: Well I got a call today from eScreen and they told me my creatine were extremely low and asked if I had put anything in it after I told them no they said the test results would be cancelled and my employer would be contacting me as to what they want to do. I e-mailed HR at the job and thank God they said they would let me reschedule it so now I have until 4:30 PM EST on Monday (4 days) to retake my eCup drug test and I am thinking about trying to just substitute again but this time from my friends urine. Here are my questions: 1. Do you guys agree that substitution would be my best method? If not what would you guys recommend? 2. It would be safer using a friends urine rather than going synthetic right? 3. How long can I store human urine for? I've read conflicting answer of up to 8 hours to 2 days without refrigeration. Also would storing this urine would affect the creatine levels (or anything that they may test in eCup)? 4. According to the link below the eCup has GC/MS confirmation so would me substituting have any affect on this? 5. My last question is is the temperature strip that comes on the bottle with synthetic urine affected by water? Will it still work if I dip the whole bottle in a cup of warm water? More specs on eCup Instant Test: eCup Drug Testing Instant Drug Screening Services Thanks a lot for any help that I may receive and I shall update this thread with my results! P.S: Don't ever use Magnum synthetic urine or shop at Wrecked Smoke Shop in Tampa, FL because they are liars!