Tullamore D.E.W. XO Caribbean Rum Cask Finish is the Original Triple Blend Irish whiskey with an additional finish in first fill XO Caribbean rum casks for sweet tropical notes. Irish heart and Caribbean soul, we call it the Beauty of Blend. What makes it so special? Triple Distilled – Smoother Whiskey. Triple Blend – Deeper Character. Triple Wood Matured – Richer flavour.