I thought dry powder was the whole concept.
Anyone here old enough to remember Lik-M-Ade? Little paper packets of flavors like lime, lemon, orange, cherry, etc. They only cost a couple of cents per pack waaay back then.
We kids would just tear off a corner or the top and sprinkle a little into our mouths, where saliva would dissolve the powder and make it a liquid drink/swallow.
I can easily see such an application for alcoholic powders.