Looks like the makers mark is an F in a hex. Fairmount Glass Works/Company, Fairmount, Indiana (1889-1906) & Indianapolis, Indiana (c.1906-1968).
Might be a sauce or syrup bottle, the small opening leads me to believe its some kind of dasher bottle.
https://glassbottlemarks.com/fairmount-glass-works-fairmount-glass-company/