There is over a thousand energy drinks on the market... believe it was actually over 1200 around 18 months ago.
Xyience put out a decent tasting product. Be weary of any stimulants you put in your body =0) but I would say the 5hr energy everyone mentioned I also take.. I dont get the shakes, I'm hypoglycimic to boot..
Gandorma or something similiar, is a fungii that a friend of mine is trying to break in the US market.. has a lot of the same antioxidants as coffee and tastes very similar without the caffeine but the guy has been after this market for years and wont listen to me about getting/ targeting the electrolyte/flavored-water market instead.
I think its dannon? they make fractions of a penny off each bottle of water sold.. hard to compete with that