Charcoal Mellowed drop by drop, and then aged in handcrafted barrels. The Tennessee Sippin Whiskey is ready only when the tasters say it is. They use their senses, just like Jack Daniel himself did. In fact, more than a century later, the Tennessee Whiskey is still judged the same way. By the way it looks. By the way it smells. And of course, by the way it tastes. 40% Alc./Vol.