Furthur Straight Bourbon WhiskyFurther Bourbon is named in honor of Further, a 1939 school bus that was owned by novelist Ken Kesey, author of best selling novel, One Flew Over the Cuckoos Nest. Furthur Bourbon is a blend of 3 and 5 year MGP High Rye Bourbon in newly 4 charred American Oak 53 gallon barrels. Distilled at MGP in Lawrenceburg, IN, bottled in Pembroke, KY at 101 Proof Non chill filtered. Mash Bill 60% Corn, 36% Rye, & 4% Barley.