Simple - I can fill my bottles at the start of a ride and reload them wherever I end up. Tastes are mild and way better than the sugary drinks you're usually forced to drink/buy and it doesn't upset my stomach...major problem with the gatorades etc out there

Drop a Nuun electrolyte tab in a bottle of water for faster absorption and something like twice the electrolytes of Gatorade/Powerade... and zero sugar. It's portability is genius and the light flavor is refreshingly palatable. (via Nuun)

Cured my hangover in 45 seconds flat!

nuun is great! It’s effective, simple to use, and comes in a convenient – take it with you – waterproof tube. I’m a multisport athlete who has been using nuun for 3 years. Before discovering nuun, I used to drink plain water because all the energy drinks - loaded with sugars – I tried upset my stomach. As a result, keeping my electrolytes balanced during exercise was always a challenge. Now that I found nuun that has no sugars, I never get an upset stomach and simply drop a tablet/water bottle and go. It even tastes great so I end up drinking more which is always a good thing. Give it a try!
Please note that I am now (though I wasn't when I first used it) a nuun sponsored adventure racer so you'll have to make up your own mind about this product. But, since I use it all the time in some of the most demanding endurance conditions in the world, you might find my feedback helpful

Electrolyte tablets

These things really seem to work and they taste pretty good too. You don't have to swill quite so much after you enduro sweat-a-thons. I hate having water slosh around my belly. (via Alyson)