how long an open bottle Kalua, rum, vodka in the pantry last?

Jordan asked:


I have seen people responded days/weeks for wines. My question is specificically about Kalua, rum and vodka. how long open bottles of Kalua, Rum, or Vodka in the pantry last? I don’t drink. Once every blue moon, I cook and bake cakes with liquor. I **** buying a new bottle everytime I need only half of a cup. Thanks

Raymundo