Yeah, water. Alcohol would just dehydrate you even more.

[ Or at least, so he's been told. Peter just crinkles his nose a little at that last part though. It's okay if other people do it, he just can't really ever imagine himself drinking. ]

I don't know-I mean, for one I don't even know if I can get drunk with my metabolism. And two, I don't know that my senses could handle it-just the smell almost made me dizzy.