Renpure organic shampoo is offering a free trial to those who buy it. All you do is save your receipt and send it in with the tag on the bottle. The form doesn't say anything about a limit, but I got separate receipts just to be on the safe side. I found these guys at the Giant Eagle in Dry Tavern, PA of all places. The renpure website has a list of retailers, but it doesn't seem difficult to locate it.