Hi, everyone.
I'm back, but between catching up at work and Christmas preparations have been pretty swamped. So many apologies to those (especially David and Anne) who haven't had responses to e-mails.
Pamela - I have more information on UGB (later United Glass, now part of Owens-Illinois), which I've picked up along the way of researching its two tableware subsidiaries (Sherdley and Ravenhead) and which I'll share here as soon as I have time (hopefully this evening or at the weekend). I've never seen anything like this bottle before - as Anne said, most of their production was pretty utilitarian. So I'd be inclined to agree with your theory that this was an ordinary bottle embellished by local craftspeople in Shanghai.