I have a sealed bottle of vodka I got as a gift 2 Christmases ago. I don't often have a use for plain vodka, but I've been meaning to do a vodka sauce for pasta. How long will the bottle last? I always thought liquor lasted forever, but I had an opened bottle of orange vodka in the freezer and a bottle of rum at room temp that I'm not entirely sure how old they were and.....well, they apparently don't last forever.