Jack Daniels Old No 7 Sour Mash Whiskey 750 mlCharcoal Mellowed. Drop by Drop. With only the finest grains, pristine water from the Cave Spring Hollow,and mellowed drop by drop through sugar maple charcoal. We proudly age in new, handcrafted white oak barrels, the same way weve been doing for more than 150 years. And our Tennessee Whiskey doesnt follow a calendar. Its only ready when our tasters say it is. We judge it by the way it looks. By its aroma. And of course, by the way it tastes. Its how