I had one of those QS drop in pumps and it was painted metal.
Could be kerosene?? Glass oil bottle metal spouts have a small opening tho.
It is just like this glass cly lubester that I have. Rubber acts as a squeegee on the inside of the glass.
LOOKING-4:WELDING SIGNS,Charter/Finance/PulOil/Trulite/TruTest-Oils,True's gas CORALINE/RAINBOW, Gardner 70 items of Yakima wa., Wa/Or/Id Chief items