Yeah, bottles don't really hold a lot of water. [ And carrying multiple bottles is just a hassle. ] I don't really know what would be good for holding a lot of water, though.

And I'm not sure if there's much space to set up for individual people, as much as it would be nice. [ It's tough to find place on the train that could be completely cleared out. ] Are there any places on the train you're most comfortable with?