Islay Cask Strength Whisky: Depending on ones point of view this island of the famous brown waters produces either the greatest spirit in the world or something akin to medicine. The full iodine / seaweed flavours are not for the beginner. These Malts have had no water added since being placed into cask following-distillation. Their strength can vary with time in the cask due to being stored in either a dry or a damp atmosphere. Cask strength Malts have greater concentration than standard.