Hmm. The reflections on the sides were in fact the objective. To have clean lines, outlining the shape of the bottle, devoid of any unattractive bits that may be floating around the room, and show up on the bottle. The dark line was also intentional, to show a contrast and further outline the bottle shape. Keep in mind I am only using one flash, and bouncing multiple surfaces. Perhaps it still needs refinement, to fine tune the shape? Would different shape or sizes pieces of fomecore help with this? During this process, I realized I could use a piece that goes all the way the ceiling, and almost everything shows up on the glass.
lk