MADRE DE DEUS, Brazil (AP) — They couldn't see it, but they could hear it. Carnival revelers Sunday in northeastern Brazil 's Madre de Deus heard the aluminum can street party before spotting it: More than 30 paraders decked out in cumbersome outfits made from hundreds of beer and soda cans clanged their way around the island in Bahia state’s Bay Of All Saints. Each costume — called a “pierro” — is the result of arduous work, made from approximately 1,600 cans gathered over the course of the previous months, then thoroughly washed to dispose of lingering odors.