My first tip is to buy some cheap bottled water at walmart and then take it with you around disney.
The dasani water they sell is expensive and doesnt taste nice to us.
Water at Walmart is about 5 times cheaper than at Disney
may I also add that kool aid, lipton tea, and a whole slew of other companies have made singles to put in the water. Great flavour to them too!
I hate Dasani water. It's in nearly all the airports here too. I have to hunt for something that isn't.
Taking your own water is an excellent idea. If you freeze it (provided you can, of course) you can use it to keep a lunch cool, and then have water when it thaws.
'Catz's tip is great too. Those little single serving packets can go a long way toward making the Disney water palatable. Just watch the caffeine content though. That will aid in dehydration, which is the last thing you want at WDW.
I love the singles to put in water!!
I plan on packing a whole slew of them when I go!
I'm with the freezing tip too! We did this on every holiday right from the first.