I saw this on top of the ground on a site that has some 1800’s items and don’t know what it is. The diameter of the whole object is slightly bigger than a quarter. The glass is very thick like old bottles usually are. Is it a pontil?
As many as I've seen, this was the only decent picture I could find of one. The term "puff" comes from the blower only having to give just a puff of air to blow such a small bottle. Usually made to contain medicines of some sort. Hope this helps.