The one's I have glow green under UV light. I'm thinking olives or capers maybe. The seam doesn't go all the way up to the top either I'll try looking for them.I see these in 1950's era dumps sometimes, always just called them jeanie bottles without much thought for what they're actually for. My best guess is fancy olive oil. Nice gun too btw.
This particular one is Charles Gulden New York 1910 or so and was used for capers olives that type of thing.Found same types, kept them still don't know what they are used for.
Learn something new everyday!Those are generally referred "beehive" bottles and I've seen examples in that general style going back to the late 1800's, though those were used for peppersauces generally. That style of ejector ring mark and the circle of "ridges" on the base I see very often on bottles dating from the late 1960's all the way until the present day, and I would suspect yours is from the 1970's-80's. Anecdotally I've seen them contain olive oil, vinaigrettes, etc.