Some folks just have a high tolerance for alcohol. My husband is one, he couldn't get drunk if he tried (and he HAS tried, LOL).
I hope I didn't give the impression that I was disapproving in any way of your daughter's activities. Not at all!
I know alcohol is treated very differently in other parts of the world than it is here in the 'states. It's great that you can be dd's driver. Though it's not "acceptable" here to have young people drinking, we always allowed our kids to have a sip of whatever we were drinking, used it at family and religious occasions, and always talked openly about alcohol. Thankfully my kids are great about taking turns as the designated "sober sam" who can keep an eye on everyone and make sure they get home safely.
No i didn't read it as you were disproving about her activities at all. I think your right to speak about it with your children and let them have a taster too. That's what i did as a youngster and what im doing with my son too otherwise, when they do become of age i think there is more of a risk that they will go over the top. A bit like me at the food bar on the first night of an all inclusive holiday!!!!!