Bulleit Bourbon is distilled and aged in small batches and stored in a single-story warehouse which reduces inconsistencies in the maturation process. Bulleit Bourbon is aged in American White Oak barrels that are flame charred, giving the bourbon some of its color and flavor. It is aged not a drop less than 6 years, creating maturity and smoothness. The final, 90 proof product is formulated by mingling, not blending, two and sometimes three of the distillates to ensure consistency in the nose and taste. This gift pack includes 2 rock glasses.