Jack Daniel's Black 1L- Experience determines maturity. It's what a whiskey experiences while inside the barrel and not simply how long it's been there that gives it the rich color, character and taste we call maturity. Mellowing their whiskey through 10 feet of sugar maple charcoal, crafting their own barrels and meticulously controlling where that barrel rests in the barrel-house - each contributes to how Jack Daniel's classic whiskey matures.