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Un envase para pastas, autocerrable, caracterizado esencialmente por el hecho de tener su cuello constituido por un conducto flexible de longitud arbitraria en el que la abertura o paso de este conducto es sustancialmente laminar formada por las dos caras del mismo enfrentadas entre sí dejando un estrecho paso que la propia elasticidad del material del cuello basta para mantenerlas cerradas, estableciéndose así un cierre automático que es vencido solamente por el efecto de empuje que realiza la pasta envasada al ser presionado dicho tubo, cerrando la apertura al cesar dicha presión.