I just came across Pepsi Next and I have to say, I don't get it. It's a combination of artificially sweetened Pepsi (like diet Pepsi), but still with some sugar in it.
So it's the worst of both worlds.
From what I read on Pepsico's website it's to fill in the moderate calorie beverage market.
There is already a growing concern with the use of artificial sweeteners and now they are blending them with one of North America's biggest current health concerns: refined sugar.
I give this one a no thanks. Water, milk, tea and coffee(in moderation) are your best choices. Occasionally, some 100% fruit juice can also have it's place. Save your calories for your food. Your body will thank you.