You are probably over 50 if you ever used one of these. My dad used to call them guaranteed oil spouts as they were guaranteed to puncture the metal or cardboard oil can and they were guaranteed to leak. When did they get away from cans and go to plastic bottles?? I had an after school job at a grocery store during my high school years 74-78 and when the oil cans always seemed to leak on the shelves and make a big mess. Most were cardboard cans with metal tops, might of had a couple of brands that were all metal cans, but I seem to recall most were cardboard cans at that time and they leaked and if the can spout did not seal well they leaked even worse. I used to have several of those oil can spouts but must have tossed them when oil went to plastic bottles. I am guessing it must have been early 90's when oil went mostly to plastic bottles.