I think that dehydrated water would be an ideal companion to my Goretex drink bladder.
The side of the bladder which is adjacent to your sweaty back is constructed of Goretex membrane. The sweat produced by the skin on your back goes thro' the Goretex into the bladder and, since it consists of water and the electrolytes of sodium and potassium, plus some other trace elements, it will chemically bind with the dehydrated water to produce a perfectly balanced sports drink, thereby destroying, at a single blow, the entire sports drink industry.