Bottled-in-bond is a type of whiskey that is a product of one distiller in a single spring or fall season and has undergone aging and maturation for at least four years in a federally bonded warehouse. The whole process of creating the bottled-in-bond whiskey has to take place under the jurisdiction of the United States of America according to the rules of the Bottled-in-Bond Act of 1897. The alcohol content of the final product should be 50% ABV or 100 proof.
For more detail see the article: What Does Bottled-in-Bond Mean as it Relates to Bourbon?
