In USA I have bought two types of Crystal Light (that's a flavoring for water, basically). 2 years ago I bought sugar-free Arizona green tea, which was acceptable (and a nice caffeine boost on the hotter days), but way too sweet.
Type 1 of the Crystal Light flavorings is Pomegranate Lemonade, presumably with some skin-nourishing properties (well...). The package is for a 16.9 oz water bottle (that's half a liter). I've tried it with 1 liter of water and it is still way too intense, might work with 1,5 liters, but isn't too bad after all.
Type 2 is "Peach Mango Green Tea", and I cannot help but think: why on earth did I buy this? - I have diluted the stuff with 1 liter of water and it is sickeningly sweet. I have added another liter of unsweetened freshly brewed green tea and it still sucks, so I will add another liter of (second brew) green tea to make it palatable...might work very cold on lots of ice as a summer drink.