Tullamore D.E.W. XO Caribbean Rum Cask Finish is our triple blend Irish whiskey finished in the finest first fill XO rum casks. XO rum casks deliver sweet tropical flavors. Bringing delicious caramel and banana notes with hints of dates and raisins. Tullamore D.E.W. XO Caribbean Rum Cask Finish pays tribute to the role of Irish Immigrants in the development of rum in the Caribbean in the 17th Century. Irish heart and Caribbean soul.