Spirits Works Distillery Four Grain Straight Bourbon Whiskey (Batch # 006) is a small batch, limited edition whiskey made from a blend of four grains: corn, rye, wheat, and malted barley. It is aged for at least two years in new, charred American oak barrels. The whiskey has a deep amber color and a complex flavor profile with notes of caramel, vanilla, oak, and spice. It is bottled at 90 proof and is best enjoyed neat or on the rocks.