El gentilicio "jarrillero" Curiosity · Portugalete, Bilbo Handia / Gran Bilbao, Bizkaia Image of Portugalete, not of the place itself. The people of Portugalete are known by the demonym "jarrilleros", from the nineteenth-century tavern custom of serving chacolí (a local wine) in small jugs called jarrillas. Photo: Ugo Cuesta (CC BY-SA 3.0) What to see and do in Portugalete