John_V 

Sam's club sells a product called Zip-Fizz in orange and grape flavor. They taste pretty good and work quite well in our Florida summer heat. Since it's a powder, the containers are small enough that you can carry several in your jersey pocket and still have room for other things. I've tried the two and prefer the orange flavor more than the grape. I also have problems with increased phlegm production after drinking a Gatorade.