Nice box.
Ethanol was distilled for non-drinking purposes - medical, industrial, etc and was not then nor today subject to the same taxes as spirits for consumption. However, it was sometimes used for drinks anyway, for the cost-savings. Much as "off-road" diesel is today. Confession: I once used some "excess" ethanol used for dehydrating samples, to spike the punch at a grad school Halloween bash...(I don't recommend this unless you are 100% sure there is no additive that makes the ethanol undrinkable).