Packaging for liquid infant food

Claim 1

AS AN ACCESSORY FOR AN OPEN MOUTHED CONTAINER, SAID CONTAINER HAVING AN EXTERNAL GROOVE ADJACENT TO ITS MOUTH AND SECOND GROOVE FURTHER REMOVED FROM SAID MOUTH AND SEPARATED FROM SAID FIRST MENTIONED GROOVE BY A SHOULDER, SAID CONTAINER HAVING A SUPPLY OF LIQUID INFANT FOOD THEREIN AND HAVING ATTACHED A NIPPLE WHOSE SKIRT EXTENDS OVER SAID MOUTH, SAID NIPPLE HAVING A PERIPHERAL PORTION SECURED IN SAID FIRST MENTIONED GROOVE, A CLOSURE HAVING A GENERALLY FLAT AND CIRCULAR CENTRAL PORTION AND A CUPPED SIDEWALL, SAID CLOSURE HAVING BEEN PLACED OVER SAID MOUTH OF SAID CONTAINER, SAID NIPPLE BEING INTERPOSED BETWEEN SAID CLOSURE AND SAID MOUTH, SAID CUPPED SIDEWALL EXTENDING AXIALLY BEYOND SAID PERIPHERAL PORTION AND SAID SHOULDER TO A POINT OPPOSITE SAID SECOND MENTIONED GROOVE, SAID SIDEWALL HAVING BEEN THEREUPON BENT BEYOND THE YIELD STRESS OF THE CAP MATERIAL INWARDLY INTO SAID SECOND MENTIONED GROOVE, SAID SIDEWALL THUS DEFORMED THEREUPON BEARING UPON THE UNDERSIDE OF SAID SHOULDER AND HOLDING SAID CAP FIRMLY IN PLACE UPON SAID CONTAINER, THE SAID FLAT CIRCULAR PORTION OF SAID CAP SQUEEZING SAID SKIRT AGAINST SAID MOUTH OF SAID CONTAINER THEREBY FORMING AN AIRTIGHT SEAL.