Is she too scared to take treats when you get them out?
If not, could you try getting them in and out of the cupboard regularly and simultaneously dropping something delicious on the floor for her to eat? It might help with counter-conditioning if she starts to associate the sight of the glasses with something pleasant happening.
Once she's not reacting to you getting them out, perhaps leave them out in full view, so their presence just becomes normal, but don't do this until she's already happy with you getting them out of the cupboard or you could push her above threshold.
From there I'd start to drink water out of them and get her used to that, before introducing a bottle.
Once she's used to the glasses and ok with you drinking out of them, then would be the time to start work on the next stage and introduce the bottle in a very similar, controlled way.
I think if you try and counter-condition the bottle and glasses at the same time it's likely to be too much. Essentially you need her to do three separate things, 1. break her association between the glasses and champagne/bottle (and the inevitable pop that goes with it) 2. break her association between the bottle itself and the pop and 3. desensitise her to the sound of the pop, so that it's no longer a big deal.
Have a google and see if there are champagne cork pops on any of the dog sound desensitisation cds. If there are, you can start by playing them almost inaudibly and very slowly build up the volume to normal cork-popping levels as she starts to tolerate them.