Automatic opening, venting, and closing re-sealable container closure

A closure, set within an aperture of a container end wall, for gas tight containment of dissociating gasses that emit from carbonated beverage, whereby said container is a beverage container, and becomes pressurized when sealed,

• said closure comprising;
• a rim seal portion, inserted into said container end wall in circumferential sealing engagement defined by said container aperture, having an upper surface located on the exterior of said container, and a lower surface located on the interior of said container;
• a small diameter gas vent hole located within said rim seal, communicating between said exterior and interior surfaces of said container;
• an internal opening, incorporating a tapered depending wall, said taper being open toward said exterior with a first diameter, and open toward said interior with a second larger diameter;
• a sealing panel, having an upper surface located toward the exterior of said container, and a lower surface located toward the interior of said container, pivotally attached to said lower surface of said rim seal;
• said sealing panel having on an external periphery a depending wall with an complementary taper to said rim seal, dimensioned to fit in sealing engagement within said rim seal, located in a first stored sealing position within and against said rim seal, and having a means by which said sealing panel can be selectively rotated into a second stored pour open position, located within said container interior;