Fee Brothers Gin Barrel Aged Orange BittersFee Brothers Gin Barrel Aged Orange Bitter 4 oz bottle New York Fee Brother's have aged their classic Orange Bitters in Gin barrels giving these bitters a unique and amazing twist. The barrel aged bitters are released only once a year, and quantities are limited. So when they are orderable, do so quickly before they are gone for the year. About Fee Brothers Fee Brothers is one of three remaining bitters makers in the US that had its start before