Whiskey
Unopened, whiskey keeps practically forever, and opened for many years. The high alcohol preserves it — and it carries no date.
Why whiskey needs no date
Whiskey is the prime example of a drink with no best-before date. At around 40 percent alcohol it sits well above the 10 percent mark and is exempt from a best-before date under EU law (and US spirits go unlabelled likewise). The high alcohol acts as a preservative, so whiskey practically does not spoil — there is no safety issue here.
Unopened and stored upright, a bottle of whiskey keeps for decades without losing quality. One key point: unlike in the barrel, whiskey does not age further in the bottle. A ten-year-old whiskey kept another ten years in the bottle does not become a twenty-year-old — maturation ends at bottling. The age on the label always refers to time in the barrel.
After opening, the aroma slowly changes as oxygen gets into the bottle. While the bottle stays well filled, the whiskey is good for years. It only gets critical when just a small amount is left: then there is a lot of air in the bottle, and the aromas flatten over months. A tip: decant nearly empty bottles into a smaller vessel and enjoy the rest within a year or two.
Connoisseurs know another effect too: in very old bottles left open for a long time, the fill level can drop slightly over the years through evaporation. For everyday drinking this does not matter. What matters more day to day is not to nurse an opened bottle down to a small remnant over years and then leave it standing, but to enjoy the last third a little sooner, while the aroma is still full. A cool, dark cupboard away from heat and sunlight is the best spot for it.
How do I spot old whiskey?
Whiskey barely spoils — it is all about the aroma:
Whiskey does not go bad in the sense of undrinkable. Stored properly, there is no safety risk.
With a nearly empty bottle, the aromas grow duller and less intense over the months.
A crumbling cork can leave bits; a light haze when cold (non-chill-filtered whiskey) is harmless.
Shelf life at a glance
Only the fill level of the opened bottle really counts:
| State | Shelf life |
|---|---|
| Unopened, upright | practically unlimited |
| Opened, well filled | many years |
| Opened, nearly empty | months (aroma flattens) |
| Ageing in the bottle | does not happen |
Store it right
The right storage keeps whiskey aromatic for a long time:
Store upright — unlike wine: the high alcohol would attack a lying cork and cause cork taint.
Cool and dark — direct sunlight and heat harm colour and aroma.
Seal tightly — close the cork well so as little alcohol as possible evaporates.
Decant the dregs — pour nearly empty bottles into smaller vessels to reduce air contact.
Common myths
A few myths surround whiskey:
No — maturation ends at bottling. Whiskey ages only in the wooden barrel.
Practically not — the high alcohol preserves it. Only the aroma changes slowly.
Wrong — whiskey stands. The strong alcohol attacks a lying cork.
A nearly empty, aromatically flat whiskey need not go: it works for cooking, sauces, marinades or a cocktail where the fine aromatic nuances are lost anyway. So even the last of the bottle gets used well.