Stellum Single Barrel Straight Bourbon Whiskey Perseus is a cask-strength American bourbon selected from Stellum Spirits’ single-barrel program. Each barrel is bottled at its natural cask strength, showcasing the distinctive character of the individual barrel. This Perseus release is bottled at a robust 114.66 proof, delivering concentrated bourbon flavors with rich sweetness, spice, and oak character. Stellum describes its single barrels as individually selected barrels bottled at true cask strength.