Dad’s Hat Bottled In Bond Pennsylvania Straight Rye 750 MLThis rarest rye whiskey ever. While fully mature at four years of aging, this whiskey is destined to delight rye lovers everywhere with multiple layers of intense spice, that rye is known for. Due to a growing problem with counterfeit whiskey, the U. S. congress passed the Bottled in Bond Act of 1897. As a result, strict quality standards were established for a whiskey to wear the exclusive "Bottled in Bond" designation.