St. George Baller Single Malt 750 MLBaller Single Malt from St. George Spirits over in California has seen a wonderfully unique maturation. The whiskey is initially aged in used bourbon and French oak wine casks, and is filtered through maple charcoal. Following that, it's finished in casks that which previously held house made umeshu, a Japanese style plum liqueur that the folks at St. George made entirely from California grown ume fruit. Baller is named for its popular Japanese style