Were you the one who originally posted the recipe for vodka, creme de banana
and hershes kisses?
In any case, the bars I know of that use pineapple infused vodka as a feature
have a water cooler type jug to store it in, and keep the pineapple chunks in
it the whole time. As far as what happens when the vodka runs out, I'm not
sure, but I agree that it's probably bad to let them sit in open air.