1
The cask has a history
New oak behaves differently from a cask that previously held bourbon, sherry, wine or another spirit. Wood species, toast, char and previous fill all influence what the spirit can extract.
← Spirits
Spirits, explained
What the cask is really doing
Wood can add flavour, soften edges, allow slow oxidation and concentrate a spirit. More years can also mean too much wood, so age is a clue rather than a score.
2
Climate changes the pace
Warm warehouses can accelerate extraction and evaporation; cooler climates may develop more slowly. This is one reason ages are difficult to compare across countries.
3
Evaporation changes the liquid
Water and alcohol escape through the cask over time — the “angel’s share”. Which evaporates faster depends partly on climate and storage conditions.
4
Not every spirit improves indefinitely
Wood can add complexity, but it can also dominate. Balance matters more than simply accumulating years.
5
Some categories do not need wood
Gin, vodka, blanco tequila and many white rums can be complete without long ageing. Fresh raw-material, fermentation or botanical character may be the point.
Now change the bottle
The principle stays. The result can be completely different.
Grain — commonly barley, corn, rye or wheat
Whisky
Explore A distilled alcoholic base flavoured around juniper and other botanicalsGin
Explore Sugarcane products — commonly molasses or fresh sugarcane juiceRum
Explore Fermentable agricultural raw materials, commonly grains or potatoes but not limited to themVodka
Explore Mature agave plantsAgave spirits
Explore Wine or other fermented fruitBrandy
Explore Spirits, wine or other alcoholic bases flavoured and, in many liqueurs, sweetenedLiqueurs
ExplorePut the theory into a glass