i have done what he is asking storing old piss does not work fyi it breaks down no matter what so when you store it in the fridge for a few days come back and see lumps meaning you cant keep it more then 24hrs i thought i had a drug test comming so i bought synthetic urine and got the 2 day shipping cost me 75$. My cousin uses this stuff to pass his parole piss tests he also uses the fake dicksince the guy goes in the rest room with him but he doesnt go in the stall