My cousin convinced his wife that once you open a bottle of Baileys you have to drink it all or the cream will spoil.
Michael: And you finished off the whole bottle?
Lindsay Funke: I had to, it's vodka. It goes bad once it's opened.
Michael: I think that's another of mom's fibs, like "I'll sacrifice anything for my children".https://cooking.stackexchange.com/questions/9420/why-doesnt-...
"If you don't drink your orange juice while it's fresh, it's no use."
Though the time frame is probably greater than casually sipping