Ahh thank you much for the input The only thing that freaks me out about substitution is getting it into the bathroom with me. I have never been drug tested before and some people tell me they are patted down before using the bathroom and some tell me they are just let into the bathroom without being checked first.

I'm also worried about substitution because if the tests are "random," I'd always have to have the sample and warming device on me. Another user said they use "hothands" to warm the sample but I am afraid I will not have enough time to warm it.