The Glenrothes single Speyside malt whisky, distributed by Maxxium UK is bolstering its range with a new series of single cask bottlings from the late 1960s and 1970s. Since 1994 The Glenrothes has released less than one single cask a year. However, The Glenrothes newest series, The Extraordinary Cask Collection, will be welcomed by whisky …