Geez. I was just concerned about staying hydrated on a seven hour flight when I asked this question. Now it seems like I should take a couple of doses of Imodium before I leave home.
Seriously again, It's good to see that humor can exist with serious environmental concerns. I travel with several empty bottles that I can refill from large water bottles. After experiencing the results of a bad municipal water supply in a country where that should not be an issue I find it safer to be sure of what I'm drinking.
And I happen to really like the taste of Dasani.