i know a couple people who go to GNC, WalMart, wherever, buy something, take it home, carefully remove that top seal from the opening of the jug, dump out whatever is in it, replace it with kool aid, flour, sugar, etc, glue the seal back on and take it back and say they changed their mind and want something else. most stores will have no problem with this, so they get 2 jugs of whatever for the price of one. yes, it is kind of shitty to do, but it does work quite well. not really a bootleg, per say, but rather a scam.