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Claim 1

IN COMBINATION, A CONTAINER HAVING A NECK PORTION TERMINATING IN AN OPEN END, AN ENLARGED COAXIAL RECESS FORMED IN SAID NECK PORTION EXTENDING FROM SAID OPEN END ANAD TERMINATING IN A SUBSTANTIALLY FLAT HORIZANTAL LEDGE AT A FIXED DISTANCE FROM SAID OPEN END, MEANS FORMED ON THE OUTER PERIPHERY OF SAID NECK FOR ENGAGING AND RELEASABLY RETAINING A CLOSURE FITMENT, SAID CLOSURE FITMENT INCLUDING A SUBSTANTIALLY PLANAR END PANEL HAVING A SIZE AND SHAPE GENERALLY CONFORMING TO THE SIZE AND SHAPE OF SAID OPEN END OF SAID NECK, A PERIPJERAL SKIRT DEPENDING DOWNWARDLY FROM THE OUTER EDGE OF SAID END PANEL, MEANS ON THE INNER SURFACE OF SAID PERIPHERAL SKIRT FOR ENGINING SAID CLOSURE RETAINING MEANS FOR RELEASABLY RETAINING SAID CLOSURE FITMENT ON SAIF OPENING, AND A SECOND SKIRT INTEGRALLY FROMED FROM THE SAME HOMOGENEOUS MEASS OF MATERIAL WITH SAID END PANEL, SAID SECOND SKIRT BEING TUBULAR IN SHAPE AND DEPENDING DOWNWARDLY FROM SAID END PANEL IN WARDLY SPACED RELATION TO SAID PERIPHERAL SKIRT IN POSITION TO ENGAGE SAID LEDGE WHEN SAID CLOSURE IS INSTALLED ON SAID CONTAINER, SAID SECOND SKIRT BEING POSITIONED ON SAID END PANEL TO DEPEND INTO SAID COAXIAL RECESS IN INWARDLY SPACED RELATION TO THE SIDE WALLS THEREOF ALONG THE FULL LENGTH OF SAID RECESS.