Harley-Davidson® Piston Skull Growler Set, HDL-18792. Man is not meant to drink alone. H-D Piston Skull Growler Set is the perfect solution! Fill up the amber colored glass growler with 64 oz. of your preferred beer and bring home to enjoy in the set of two matching 16 oz. pint glasses. Makes a great gift for your favorite brew lover. Growler is hand wash only.