Green Spot Single Pot Still Irish Whiskey Finished In Bordeaux Wine Casks Chateau Leoville Barton is a remarkable and distinctive expression within the Single Pot Still Irish whiskey category. It pays homage to the rich heritage of Mitchell & Son Ltd., one of Ireland's last remaining wine merchants and whiskey bonders. This unique whiskey marries the influence of French oak and Bordeaux wine casks with the exceptional qualities of Irish whiskey.