This is the one I love! (Though I'm cutting down on it; I know it's not good for my insides -- and it doesn't even give me energy. Strange, if anything, it tends to help calm my nerves a bit.0
I have not tried it. I have tried the ones with juice and whatnot. Does it have that diet aftertaste like a diet soda? Zero Calories scres me on the taste. I only allow myself one a day. But if you look up the caffeine in is less than a coffee per oz. I don't get energy either I just like the taste.
I drink this Ultra Zero only for its taste. I really like how it tastes - - it doesn't taste like a typical diet/sugarless drink to me at all, either. I like how it feels in my mouth, too -- very carbonated. :)