Glenfiddich Project Xx – Old Box. One of the first pair of entries in Glenfiddich’s Experimental Series, Project XX started as a whisky created by the distillery’s 20 brand ambassadors – each selected a cask and master blender Brian Kinsman combined them to create the template for this 47%, non-chill-filtered whisky. It’s a mix of sherry casks, bourbon casks and more, with a rich and spicy character.