I find that the water is absolutely horrible. My family goes to Publix and buys the big, cheap jugs. One year I got pretty sick from the water and have been avoiding it ever since. One day my family and I ate at the Ponderosa and you could even taste the chlorine off the lettuce in the salad. Bottled water doesn't have to be as expensive as you think, go to a grocery store and buy a big jug. Some stores even have machines so you can refill your jug for about thirty cents. If you are wondering if you can handle the water and leaning towards that you can't, I advise you not to take any risks. It's not worth running to bathroom all day because you either have to throw up or use the washroom. And as someone mentioned above, the ice and pop is also bad. My mum wanted an MGM-mug so she bought one with Diet Coke in it. The pop was terrible and we dumped most of it out into the sink. BTW, does anyone know if they would let you get popcorn in it instead of pop? We never thought of asking until we left the park.
Of course, it really all depends on the water you are used to drinking. I went to Greece one year on a tour with my school and we were told that we would not be drinking local water, we would be drinking "good" water. I guess it was considered good compared to tap water, but it taste quite similar to WDW water and again, I suffered the consequences and was sick and spent the day in bed when the non-sick people went to the Acropolis. (Yes, there were other sick people.) Sorry for rambling, but I think people should be warned.
