I would continue your quest for info, but I would have to know the method of the test first. Worst case its a full toxin screen but mostly I am guessing your frozen piss heated up and taped to your leg would pass. I have known people who drank tons of water and failed for lack of creatine in urine. Some screens check for elevated levels of other things in your body that normally aren't present or as high. All and all keep checking info but I would risk it as emergency use for known cheap versions of drug test like quick strip tests.:detective1: