It just goes to show that there is about a gazillion ways to light a bottle!!
I always seem to have issues w/ reflections on the front no matter what I use.
I have tried gallons of dulling spray and really don;t like the effect on most things. I did have a friend that used talc as well as black toner powder to cut down or build up a highlight on different surfaces. This was of course pre PS.
The problem that I think we will agree with is when the client wants an "accurate" color rendition of the contents in the bottle. Back lighting, underlighting, top lighting, snoots, scrims etc all seem to get close but the actual color will probably be altered in post. Ticks me off sometimes.
"Look we added a nice amber glow" he said, don't you love it? GRRRR I think, just give me my money and do what you want to the *&^(*&^%* image.
How the hell do you get the color of a blush from a bottle that is not 100 % schott glass? HMMMM? Do I dunk my spectrophotometer in the bubbly? HMMm?
I did a shoot years ago where the client wanted each bottle sat on a wine barrell and with a glass of the stuff, cross screen stars from the rim, of the glass, fireplace in the background. And each bottle to "glow". Well we cut a hole in the barrell, stuck a regular lamp inside and viola glow. Wrong color glow. Gel it !! Red, amber, yellow, no major effect on the glow he wanted it as amber as he could get it.
So I opened the other bottle (we only had two to pick from. And showed him the liquid inside. It was a chianti...... you can't see through it. Apparently the AD had sold the idea of a reflection reversed in the bottle too.
Shot it my way after that all was good with the world...
Good luck with your AD,
Les