Storage: A bottle of open Aperol Liquor should be refrigerated once it is open. The open bottle keeps about 3 months in the fridge. ... Aperol can be slightly bitter, a bit more Prosecco can cut the bitterness.

How long can you keep aperol once opened?

I would expect it to be ok for 3 months without deterioration as long as you keep it out of direct sunlight & at a relatively constant temperature.

Do liqueurs need to be refrigerated after opening?

There's no need to refrigerate or freeze hard liquor whether it's still sealed or already opened. Hard liquors like vodka, rum, tequila, and whiskey; most liqueurs, including Campari, St. Germain, Cointreau, and Pimm's; and bitters are perfectly safe to store at room temperature.