Whisky Glenrothes 12 Year Old. A Glenrothes 12 Year Old in classic style fruity and sweet. Aged solely in sherry seasoned casks, this Speyside whisky has notes of vanilla, melon, banana and cinnamon. Glenrothes 12 Year Old whisky is part of The Soleo Collection, a range of five whiskies from The Glenrothes, ranging from 10 to 25 years old, which pay homage to the grapes from which some sherries, such as Pedro Ximénez, are made.