Trying my hand at making Posca a drink primarily consisting of vinegar and water, reportedly favored by Roman soldiers.
https://en.wikipedia.org/wiki/Posca
For the first run I went with a "Sweet Recipe", 2 cups simmering water with 4 spoonfuls of honey and 3 spoonfuls of vinegar.
Surprisingly good. Was hesitant after getting a whiff of the vinegar, but it has a good taste to it.
Other loose recipes variously suggest additions of salt, melon and/or ground coriander. Going to try whatever ones I reasonably can and see how it goes.