I was sort of hinting at what Allan Conn has just said: on holiday in Islay, the bar "menu" must have had about 100 whiskies on offer, with about 8 -10 varieties from each distillery on the island - differing in age, type of cask in which they were matured, etc. So e.g. Caol Ila is not just Caol Ila but a whole range.