Abstract: A media container and associated liquid and gas impermeable cap that fits over the opening of the container is disclosed. The cap has a skirt and top portion. On the top of the cap is an access port used for accessing contents within the container. In one embodiment, three protective layers within the cap design create a liquid impermeable and gas impermeable barrier. First, a septum is integrally connected with the inner surface of the top of the cap, next a peal-away film layer covers the access port. Finally, a gas impermeable liquid impermeable film or layer bonds to the portion of the septum facing the interior of the container.