Michter's US*1 Unblended American Whiskey 70cl Whisky

This American whiskey from Michter's Distiller in Louisville, Kentucky, is matured in barrels which had previously held bourbon. As such, this expression cannot be called bourbon, as bourbon needs to be matured in new American oak barrels - hence why it's called whiskey instead. Slightly confusing legal nomenclature aside, it's bloomin' marvellous!