Substitution is the best method. All they do is make you empty out your pockets. Take a 5 hour energy bottle, have someone who's clean piss in a gatorade bottle within 24 hrs of your test (store in fridge until ready) , put the clean piss in the 5 hour energy bottle (or something similar)(make sure it's completely full b/c you need 60 m/l for the test), tape it to your leg (you can get a hot hands heat pad if you want to keep temp up, but your body heat should be ok), go to the office, when they give you the container fill it up with the clean piss, then take a piss in the toilet (for effect) and your good to go. MAKE SURE YOU DO NOT FLUSH THE TOILET! Otherwise your sample is no good and you will have to piss again.