I don't watch this show, but my mom was telling me about this earlier so it must be a HUGE thing. I'm not trying to be disrespectful as I literally do not know anyone's names; but let me try to summarize what's happened.
Girl A saves a bottle of champagne for a whole year (omg!) for a special occasion, which I guess this somehow qualifies. Brings it out and sets it down some place. Girl B and Bachelor on a private date come across it and are like - wooo thanks producers, let's get lit!
Girl A walks in on them and is distraught. Bachelor (I guess) tries to make it right by getting a second bottle and some private time with Girl A so they can share it. Girl A's like 'I ain't no classy bitch!' and tries to shotgun the champagne and it ends up doing what champagne does when you jostle it, and it it explodes on her face.
Girl A somehow also blames Girl B for this, I guess because she 'stole' the first bottle and I guess Girl A would have been a more 'classy bitch' with her own champagne?
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My thoughts: This has got to be staged. Like who is saving champagne for a whole year and somehow thinks it's some special big deal? How the hell, or why the hell did she go to the trouble to fly that shit out there? Store it with her stuff, make sure it was ready for this specific night, etc. If she's just that much of a champagne connoisseur why did she try to shotgun it?
If this is not a set up I would just eliminate her for trying to be a self important poser. If you care about a bottle of champagne that much you're not going to disrespect it, nor would you be surprised that upending the bottle and trying to drink it in such a manner would end up like that.