Union Horse Bottled in Bond Reserve Straight Bourbon WhiskeyABV Proof: 50% 100 pf Mash bill: 80% Corn 20% Rye Age: 5 years and 3 months Tasting Notes: Toasted vanilla beans, cinnamon candy, dried fruits, and butterscotch. About the Product: Bottled in Bond Reserve Straight Bourbon is a small batch, artisanal whiskey from Union Horse Distilling Co. Handcrafted in our copper pot still and barreled in our bonded warehouse in July of 2018.