Method of obtaining a filled, fluid barrier resistant plastic container

A method for obtaining a filled, fluid barrier resistant plastic container wherein said container is exposed to a temperature in excess of 175.degree. F. while retaining the barrier resistant characteristics thereof which comprises:

• preparing a seamless, multilayered, hollow plastic container having an open molded neck and having an outer pressure molded first portion of a thermoplastic material resistant to temperatures in excess of 175.degree. F., an inner second portion of a thermoplastic material resistant to temperatures in excess of 175.degree. F., and a third portion fluid barrier layer of a thermoplastic material between said first and second layers and co-extensive therewith throughout the extent thereof, said barrier layer having a lower temperature resistance than said first and second layers so that said container has the property that when exposed to an elevated temperature in excess of 175.degree. F. but below the temperature resistance of said first and second positions said barrier layer softens or melts, but reforms in place upon cooling to retain its barrier resistant characteristics;
• filling said container through said open neck;
• exposing said container to an elevated temperature in excess of 175.degree. F. but below the temperature resistance of said first and second portions followed be cooling the container to ambient temperature to utilize said property of the container and provide a filled, barrier resistant container.