I no longer drink sodas, or any other high calorie drink, and I was a serious "coke addict."
I drink a ton of water, and I allow myself 2-3 of these a day max. They are roughly 20 calories per serving, but figure out to about 38 calories a bottle.
My favorite flavor is the pink grapefruit, you can find them at Sam's for $5.39 per 12 pack.
These have seriously been a life saver. And by that I mean I was a complete coke junkie. I would drink up to 12 cokes a day, finally moved onto diet, but it was still bad for me.
These drinks allow me to feel like I'm having something a bit sinful, while staying within caloric boundaries throughout the day. They sort of keep me sane and keep me from jonesing for the good stuff...lol.