Generally classified as "Claret Jug"...many search entries for claret, and lots of firms dealt in this kind of thing. They may also be known as a "water service pitcher" when used in commercial settings (restaurant, hotel, ship, rail, etc.). It is interesting that the top is cut at the base to show gates in a wall (Israel, Germany, ??) or doors to a structure (temple, citadel, or ?). I guess the handle is a serpent and this might repeat with the coils on the glass (among the fern/floral garden/forest). All of which may point to the nature of the face...Green man mythology, Biblical Creation story, Roman Bacchus Kult, on and on. Cut vs. pressed glass might make a big difference in sources.