The Soda Situation - Succulent Drinks w/o the Sweets?

Ticron asks: "Like most of you, my job and lifestyle revolves around drinking lots and lots of caffeine - usually in the form of soda. I've been trying to cut back on my sugar intake lately, and am interested in what some of you drink that isn't loaded down with the sweet stuff. Diet drinks have little to no flavor, and fruit punches have almost (sometimes more!) sugar than sodas themselves. Is there anything out there that maintains the convenience of a canned drink, but without all the sugar?"