Recently independent bottlers have been selecting the very best single casks from renowned (and often large scale) Scotch whisky distilleries. One of the enchanting mysteries of Malt Scotch Whisky is that even though individual casks of whisky are distilled on the same day and at the same distillery the whiskies' flavours and tastes, after maturation, may differ widely. So the secret of bottling excellent quality whiskies lies in the selection process . Mackillop searches for the casks which contain only the very best whisky.