Dewar's The Signature 25-Year-Old Blended Scotch Whisky was created by the eponymous Dewar family. It is famous for its ‘double-aged’ blend, with six months of marrying in oak casks after initial maturation and blending. This Scotch whisky's unique taste and experience is one of the world’s most popular and awarded whiskies. Dewar's® The Signature 25-Year-Old is something very special. It's for those looking to push the boat out and celebrate milestones, and to have an approachable luxury whisky in their home, office or whisky room that they can pour for those dearest and nearest when the time is right.