So this Vitamin Water stuff must be pretty popular if Winn-Dixie has already created their own knock off brand of it...
I was grocery shopping on Monday and when I got to the water to pick up more of my new favorite beverage I noticed that Winn-Dixie had their own generic vitamin water, cleverly called V-H20 (or "vitamin water", if you can crack the code).
I compared its label to the appropriate flavor of Vitamin Water and noticed that the ingredients were just about identical, except that Winn-Dixie's brand seems to contain a smidge of salt, as the nutritional info on the label lists 1% sodium. Vitamin Water doesn't contain any sodium.
Also, the Vitamin Water version includes potassium, whereas the Winn-Dixie brand does not. So heads up if you're in need of maintaining your body's fluid and electrolyte balance (see, I sound like I know what I'm talking about don't I? Thanks wikipedia!).
The only other difference is that Winn-Dixie's version was 50 cents cheaper per bottle. But if you shop around you can usually find the real stuff on sale for the same price.