"I suppose someone will suggest taking Everclear or some other 190 proof grain spirits and mix with some Crystal Light for the true multiple-use beverage item."
Yes --- apart from a backup stove fuel, it's also a disinfectant and hand cleaner. I don't suspect many people use it as their primary fuel, it's more expensive and less readily available. I carry a few ounces as backup fuel, hence I'm comfortable carrying just barely enough denatured alcohol to cook my dinners. Towards the end of a trip if/when I know I have enough regular fuel for the stove, then I can take a celebratory nip on the last night or two.
And indeed, Crystal Light is the lightest and least bulky flavor powder I'm aware of. This is also multi-use for me --- it doesn't offer all the electrolytes or other promises of sport drink powders, but it helps me stay hydrated. I tend to come back from a trip more dehydrated otherwise (um, even if no alcohol is involved ...).