You have to figure out what you need to maintain your electrolytes. I don't drink Gatorade, as I'm not looking for sugar or other 'stuff'. I use Hammer Endurolytes tablets, which give me the electrolytes I need, and I drink plain water. Makes a refill really easy, and I can pop the tablets before a ride to get the electrolytes primed without drinking a lot of liquid, that might make me need to urinate during the ride. Once into the ride, I can drink steady without worrying about having to urinate. The tablets also let me monitor my intake, and also boost that intake if I feel my muscles might be starting to cramp.