Dewars Cask Series | Cask Finish Whisky | John Dewar & Sons The Cask Series, our latest line of Double-Aged Blended Scotch Whiskies, an exploration of the effect of cask finishes from different cultures around the world on our new 8 Year Old blend. Whether rum, mizunara oak or apple brandy, these casks bring unique flavor notes that complement the classic Dewar's House Blend. The best of Scottish ...