I picked this up at a flea market. The seller had quite a few of them, and thinks they were a display item. The bottle is only half full on purpose. On the counter at the auto parts supply store, the idea would be for the potential buyer to turn the bottle over and then observe how slowly it flowed. The label reads Chemical Compounds, Inc. St Joseph, MO. That is where STP originated. As you can see, the STP letters are just block letters, not the more familiar style of letters on the can. I shot them side by side for scale comparison. Has anyone ever seen one of these? I paid $5, and after getting home and looking them up on Epay, I think it was a good price. It sure is an unusual item to add to my oil can collection. ( How many of you remember the screwdriver test?).