Healthacker.com

Netsweat is another fan of flavored water as an alternative to soda:
Flavored water is nothing new, but Aquafina and Dasani are selling water sweetened with Splenda, not aspartame or sugar. This makes these drinks a good alternative for soda; they have certainly helped us cut back further on soda consumption. (Though, we have yet to [...]

This flies against what you would expect, but diet-blog points out a study show that kids are eating less, not more.
My instinct is that this shows you how powerful making a good choice in food is, and also upping your exercise rates.