Bourbon barrels enjoy second and third lives around the world, where they're used to age other spirits

TL;DR

Wooden barrels, first used by Celts and Romans, are still vital for aging wine and whiskey, especially bourbon.
Bourbon must be aged in new charred oak barrels, a regulation established in the 1930s.
The process of making barrels involves cutting oak logs into staves, seasoning them, and assembling them without nails or glue, followed by toasting and charring the interior.
The charring process, likened to an 'alligator char,' teases out flavors like caramel and vanilla from the wood.
Temperature fluctuations in aging warehouses (rickhouses) help the bourbon interact with the wood, contributing to its flavor development.
The bourbon barrel industry is also an investment area, with investors buying newly filled barrels and selling them at a higher price after aging.
Used bourbon barrels are in high demand globally for aging other spirits like scotch, tequila, rum, and beer, and are exported in large quantities.
New finishing techniques involve aging American whiskey in barrels that previously held spirits from other countries, such as Indian whiskey.
Special barrels made from wood sourced from the Bercé forest, intended for the restoration of Notre Dame, were used to age a limited edition bourbon.
Bottles of this special bourbon, aged in the Notre Dame restoration wood, sell for significantly higher prices on the secondary market.

Continue reading the original article