sorry, utter confusion with this one............. I've just realized that there doesn't appear to be a more recent contribution for this question later than 2011 - so how did this resurface again in very recent times??
Anyway I've now linked my reply to both threads - I think.

and hope this covers any member who may have been interested.
""not so sure this helps with a maker - I'm not well up on soft drinks companies - am assuming these people were into soft drink and not hard liquor ........... R. N. Coate may have made this bottle, but unlikely in my opinion.
Two pix attached, and obviously a popular and successful design since there were two extensions, each of five years - am sure I've seen this shape somewhere in the past.
If any part of the Register text is illegible, let me know ........ I have other pix of that page which I can magnify.""