Founded by John Dewar in 1846, Dewar's first Master Blender pioneered a process to bring extra smoothness and consistency to Dewar's Whisky. Single Malt and Grain Whiskies are blended together, placed back into Oak casks and get to know each other, this process is Dewar's Double Aging. Dewar's 25YO is ann exclusive, Limited Edition Blended Scotch Whisky. Double aged in Oak Casks from Scotland's first and oldest Royal Distillery. Dewar's 25YO is exceptionally smooth, rich and elegant- distinctivey Dewar's.