A cask of whiskey is a barrel in which whiskey is aged. The price of a cask of whiskey can vary depending on a number of factors, including the age of the whiskey, the type of whiskey, and the distillery where it was produced.
Older whiskeys are generally more expensive than younger whiskeys, as they have had more time to age and develop their flavor. Rare or limited-edition whiskeys can also be more expensive, as they are not as widely available. Whiskeys from prestigious distilleries can also command a higher price, as they are often seen as being of higher quality.