The innovative and premium Double Double range was created by Dewar's Master Blender Stephanie MacLeod. This 32-year-old expression takes the matured single malt and grain whiskies and blends them, then lets each style age separately. Afterwards, both are blended together and re-casked. In the end, the liquid is transferred to Pedro Ximenez sherry casks for a round of finishing which imparts the glorious richness PX is known and loved for. The 4-sided bottle reflects the 4 stages of the aging process.