Check the label about the sugar, some of them sneak it in. I drink the flavored waters a lot, sometimes I'll put a little of sugar free flavored syrup or lemon juice in a quart of water, just to take away the "water" taste.
At work we have the bottled water and it doens't taste so bad, I can actually drink it without any problems.
49 years old, 5' highest weight-199lbs
. Started SBD Jan 2004, lost 47 pounds in 6 months, then slowly gained it all back.