i think it's a quart size flask bottle from the early to mid 1800's. It has the same sorta style as the early Philadelphia bottle companies like Washington Taylor. Shame you can't remember where you got it, because it could help narrow down some manufacturers from the early days. If you are in the US, then I'm almost certain it is from the Philadelphia area. I'm not a bottle expert, but I've had a crash course because I've found a bunch and I also used to own the house that was the original location of the old Daniel and Toy bottle company in Smyrna, DE. I got interested in the value of these things when some bottle guys knocked on my door one day wanting to dig in my yard. I let them and we found a bunch of nice pontil soda bottles worth about $100 a pop.
Your bottle has cool larger size mouth... I like it. Could been used more so for wine or even beer... Just a guess though. If I'm stumbling around town or the woods with a quart of liquor imma break the bottle I'd be so trashed, but who knows.