Slicing off the top and side was my way of avoiding a boring compo and hence uninteresting shot. The ones I tried with the whole bottle in were just that. I felt comfortable with the blank space.
Your ideas of a cut glass or fire are obviously ones which add a "story" and are objects which have lots of empathy with the nature of the bottle. As it stands I feel it is a "clean", even austere, image with no distractions from the study of the bottle's shape, the colours and reflections, and the label. For that reason I think I like it as it is but will try something different another time, perhaps as part of your still life challenge!
To be honest this was quite a lazy shot, it was taken on our dining table where the bottle already stood! I did quite a bit of work in Lightroom and PS Elements though, removing some reflections, sharpening, white balance, crop etc.