Basically a sugar/calorie flavoring for water, this is what I like besides my usual 50/50 mix of sports drinks & water:
(I doubt it has the electrolyte replenishing or added vitamin benefits of sports drinks, but it's very light & convenient)

https://encrypted-tbn1.google.com/im...OXlEQgZb_MY5kC

http://www.bevnet.com/news/2011/kraf...gy-in-december