The Soleo Collection introduces brand-new whiskies: 10 Years Old, 12 Years Old, Whisky Maker's Cut, 18 Years Old and 25 Years Old. It has replaced the Vintage and Reserve catalogs. While the product range has changed significantly, the character remains the same. As ever, old oak sherry casks define The Glenrothes. Almost 90% of the distillery's aging casks have contained sherry, a wine made from white grapes near the Andalusian town of Jerez de la Frontera, Spain.