well it wont 'damage' her but it isnt a good idea to put any type of food or beverage into a womans vagina.its has to do with pH balance and all that.even douching isnt recommended for a woman to do so Im quite sure alcohol wouldnt be good for a vagina.
You should try to put everything you can up there and send me the picture!! I once saw a woman put this really big octopussy up her cunt and it was really cool!!!!!!
But I'm suggest you to not doing it.