12 oz. After a hard day of gun fight'n, nothing beats a real sarsaparilla. Featured on the bottle of this authentic sarsaparilla is Mike Earp, owner of Earp's Western Foods, and a descendant of Frontier Marshal Wyatt Earp, made famous by the Gunfight at O.K. Corral. This sarsaparilla has an authentic taste that will pass the taste-test of even the most seasoned cowboys and cowgirls.