Koval Organic Bottled in Bond Bourbon is a single barrel whiskey produced by Koval Distillery, located in Chicago, Illinois. Being "bottled in bond" means it adheres to specific regulations set forth by the Bottled-in-Bond Act of 1897, ensuring it's the product of one distillation season, one distiller at one distillery, aged for at least four years in a federally bonded warehouse, and bottled at 100 proof (50% alcohol by volume). As for its mash bill, Koval often uses unconventional grains in their spirits, including grains like millet and spelt in addition to the more traditional corn, barley, and rye. However, the specific mash bill for the Koval Organic Bottled in Bond Bourbon may not be readily available to the public as distilleries often keep their exact recipes proprietary. Nonetheless, it's safe to assume it's made from a combination of grains, with an emphasis on organic ingredients.