It's difficult to read behind this. I'm thinking there's a back story,and a build up of tension and you've reacted so strongly because of this history an ongoing sense of discomfort in relations.
Is that accurate? To just leave like that is incredibly dramatic. I can only see someone reasonable doing that if there's an ongoing build up.
If people do things in an underhand and sly way,it's so difficult to pull them up on it. If you sense this is what's happening, it's so difficult because if you were to mention the drinks,the first reply would be to make it all your problem.
So alot here depends on the history, what your senses feel. Are you the one with the problem possibly. ( Just asking this).
If the drink pouring was deliberately done to exclude or just thoughtless, the same response would work. I would encourage your daughter to speak up for HER SELF. I'd want her to be confident enough to say ' oh hey, while you're there, could you pour me one too'.
If they're sat down already I'd say ' oh who poured the drinks? Is there one for me?' And say it in a real, non bitchy genuine way.
I personally wouldn't be too bothered by that. Unless - my senses told me, because of prior behaviour, that it was deliberately bitchy.