Single Barrel Whiskies are bottled from an individual barrel of whisky, often released only when an exceptional barrel of whisky is found. Generally, each bottle is numbered and labelled with an ID to trace its origin back to the original cask.
Single Barrel Whiskies represent the best of what a distillery can produce, as it’s a pure expression of their work and no balancing of flavours can occur from blending or mixing barrels that have aged differently.
Typically, these are the bottles that win awards for distilleries. This along with the limited supply of each expression lead to typically higher prices.