How healthy are 'vitamin' waters?

You may have noticed a growing number of functional water-based drinks in cool cabinets recently. Some are simply spring water with added fruits; others are ordinary water with nutrients and herbal extracts that promise everything from fabulous skin to detoxing and saving you from your hangover. You won't overdose drinking two or three a day, but are they good for a new year health kick? Personally, I'll be sticking with water, but here is what you get for your money:

Source - Times