Our high in small grain Kentucky Straight Bourbon Whiskeys are offered as a Small Batch - Bottled in Bond. The Small Batch selection offers nuances only premium cooper select barrels can create using 18-month-old air-dried staves. After all, the barrels impart a large part of the flavor. What is a Small Batch? At Wilderness Trail, it's 18 barrels per batch, which was the result of one fermenter. In addition, the Bottled in Bond gives you assurance the Bourbon was properly distilled, aged between 5-6 years and bottled by us under the supervision of the U.S. Government at 100 proof.