A bit of trivia that probably won't help people much BUT green coconut is a great drink when you are hot. It is called pipa here and just like Gatorade, I hate the stuff if I am not thirsty. Supposed to be incredibly good for you, and I believe it.

Regarding salt, my choice is pickles. I once spent eight hours in the desert riding, when we got out, we each bought a jar of pickles. After we ate the pickles, we drank the brine. Again, can't imagine doing that normally.