O'Keefe's Stone Ginger Beer Bottle Caps.
Eugene O'Keefe, founder of O'Keefe Brewing Company grew up in Toronto Ontario. His family settled there from Ireland in 1832. In 1862 he founded O'Keefe and Company, the first company the first to produce lager beer in Canada along with the traditional ale and porter.
Eugene O'Keefe was one of the first brewers to use motor trucks for beer delivery, the first to build a mechanically refrigerated store-house for beer and one of the first to advertise extensively. He died in 1913 and O'Keefe Limited took over the brewery. In 1916 O'Keefe began making stone ginger beer in response to Prohibition. The bottles and caps are very collectible.