The "Laphroaig Quarter Cask" was introduced in 2004. This expression is aged in ex-bourbon barrels, is finished in smaller casks, and is not chill filtered. Due to the smaller barrels used, the oak surface contact is 30% greater than with standard barrels. The company describes the effect of this as "creating a soft and velvety edge". The Quarter Cask is bottled at 48% ABV (96 proof). The 10-year-old standard-bearer is bottled at 40% or 43% ABV, depending on the local market.