How long does a bottle of armagnac last?

An unopened bottle of Armagnac can last indefinitely if stored properly, away from light and temperature fluctuations. Once opened, it is best consumed within 1 to 3 years for optimal flavor, though it can still be enjoyed for longer if kept sealed and stored correctly. Over time, the taste may change due to oxidation, but it won't spoil in the same way perishable items do.