Hinterland Bourbon Whiskey Finished in Maple Syrup Barrels is a straight bourbon produced by Ty Iechyd Da Distillery in Springfield, Missouri. The bourbon is finished in barrels that previously held maple syrup, adding notes of maple, vanilla and baking spice to the base spirit, per the brand. It is bottled at 46% ABV (92 proof) and is primarily available through Springfield Brewing Company and local Missouri retailers.