Spotted an advert in a cycling mag, for this www.infinitnutrition.eu. Looks quite interesting, they allow you to create your own drinks depending on personal requirements. You can do it from scratch (potential for a reall balls up I guess) or follow a short questionnaire.
Don't know whether its too much of a faff compared to sticking to my usual High5 stuff but it looked interesting, especially as they don't seem to use artificial sweeteners.
Anyone tried them?