Pouring nozzle with captive cap

Claim 1

A DEFORMABLE PLASTIC NOZZLE AND CLOSURE CAP ASSEMBLY, SAID NOZZLE HAVING A NECK PORTION, AN OUTWARDLY DIRECTED ANNULAR POURING LIP AT THE UPPER END OF SAID NECK PORTION, AN OUTWARDLY DIRECTED LOCKING RIB ON SAID NECK PORTION AND SPACED BELOW SAID POURING LIP, SAID NECK PORTION INCLUDING A CYLINDRICAL THROAT, SAID CLOSURE CAP INCLUDING A TOP WALL AND A DEPENDING CYLINDRICAL WALL PORTION, SAID WALL PORTION BEING TELESCOPED OVER SAID NECK PORTION, AN INWARDLY DIRECTED LOCKING RIB ON SAID WALL PORTION UNDERLYING SAID NOZZLE LOCKING RIB AND RETAINING SAID CLOSURE CAP ON SAID NOZZLE, AND AN ANNULAR WEDGESHAPED CROSS-SECTIONAL PLUG DEPENDING FROM THE UNDERSIDE OF SAID TOP WALL, SAID PLUG HAVING A GENERALLY CYLINDRICAL INNER PORTION OF AN EXTERIOR DIAMETER GREATER THAN THE DIAMETER OF SAID THROAT, WHEREBY AN INTIMATE FRICTIONAL CONTACT BETWEEN SAID PLUG AND SAID THROAT IS ASSURED, SAID PLUG HAVING AN OUTWARDLY FLARED OUTER PORTION ADJACENT ITS CONNECTION TO SAID TOP WALL, AND THE UPPER END OF SAID THROAT BEING OUTWARDLY FLARED, AND THE FLARE OF SAID THROAT BEING AT A GREATER ANGLE TO THE AXIS OF SAID NECK PORTION THAN SAID PLUG FLARE TO ASSURE THE SEATING OF SAID PLUG WITHIN SAID THROAT.