If you go to the high times web site you can find a company that sells actual clean urine.It is real urine and 100% drug free.They also send it in a kit that keeps the pee at the right temp, and can be hooked up to you so that it still looks like you are the one peeing.

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It was me,I did it.....
I killed you with buttons and bows....
all those clothes......
while you slept.
Rodger Waters