No matter whether you're distilling spirits or drinking them, we're all in search of flavour. But for distillers, there has been an increased movement that blurs the lines of their spirit by finishing them in the barrels of other spirits.  We see Whiskey finished in Port barrels, Gin finished in Whiskey barrels and, as in the case of Pappa's Pilar's latest release, Rum that is aged in Rye barrels.  Pappa's Pilar, the ultra-premium rum brand inspired by the legendary novelist, Ernest Hemingway, has just released its fourth expression within its flagship fleet.  Mixing master distiller Ron Call's two great loves, whiskey and rum, this rye-finished expression is very close to his heart. A seventh-generation distiller who made his name along the Bourbon Trail, Cole brings his roots in the whiskey industry and his nuanced passion for rum to bear.  To find out more, we talked to Cole about barrels, blending flavours, and how experimentation changes the nature of spirits.