Makers Mark 111.0 Proof Private Barrel Select Kentucky Straight Bourbon Whiskey 750 MLMakers Mark 111. 0 Proof Private Barrel Select Kentucky Straight Bourbon Whiskey 750 ML is a bold, handcrafted bourbon bottled at cask strength to highlight intensity and flavor. From the first sip, Makers Mark 111. 0 Proof Private Barrel Select Kentucky Straight Bourbon Whiskey 750 ML reveals aromas of caramel, vanilla, toasted oak, and baking spice. On the palate, Makers Mark 111. 0 Proof Private Barrel Select Kentucky Straight Bourbon Whiskey 750