Last three from an old privy - any flask experts?

[halfdime]

I finally got around to cleaning the last three bottles from a very interesting privy (many hair restoration products, a nice ink, etc.) and here they are. Two appear to be flasks, with irregular tops and very little else in the way of identification. One does say "Full Pint." The big square bottle has what appears to be an interlocking "YV" on the bottom, which I assume is the bottle manufacturer. I'll do some research on that, but I'm always willing to hear the experts weigh in! One of the flasks has a circular area on it, which I assume would have had some sort of label (?). Thanks for checking these out!

 

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[Steve in PA]

Those are common "coffin" style whiskey flasks that were popular from the 1890's up to prohibition. I dug a ton of them out of the old Idlewild Park dump when I was a kid.

 

[ANTIQUARIAN]

I remember digging those kinds of whiskey bottles too,
we used to call them shoe-fly flasks.