San Francisco's
Soma Beverage Company, which makes the Metromint line of flavored waters, has a unique offering in its Chocolatemintwater, a zero-calorie, no sugar beverage. Made with purified water, mint, and "cocoa essence" (whatever the heck that is), it actually tastes like chocolate mint -- which, unlike, say, bubble gum soda -- isn't a disconcerting experience.
Finally, a solution for those of us who have proclaimed our undying love of chocolate by saying we'd drink it if we could. This is our idea of health.