The criteria on which Adelphi selects the barrels are rarity and maturity, but especially taste. On average, Adelphi accepts only 4% of what is offered to them. Each bottling is limited to 100 - 700 bottles, depending on the size of the barrel. This is a blend of 4 malts from sherry butts of Islay, Orkney and Speyside, supplemented by one of those famous, heavy sherried and very high in alcohol hogs heads of Glenrothes.