Container with gas release feature

A method of packaging a product that tends to release a gas after packaging, the method comprising the steps of:

• providing a rigid or semi-rigid container body having a bottom wall and a side wall extending upwardly from the bottom wall and terminating at an upper edge, wherein the container body comprises a heat-sealable polymer material and the container body is threaded adjacent the upper edge;
• placing the product into the container body;
• providing a gas release valve in one wall of the container body and operable to release gas from the container when the pressure differential between the interior and the exterior of the container is sufficient to open the valve;
• providing a closure comprising an overcap assembled with a flexible induction-sealable gas-barrier membrane so as to form a unit having the membrane disposed against an underside of the overcap, a lower surface of the membrane being formed of a heat-sealable polymer material, the overcap having a skirt that is threaded along an inner surface of the skirt;
• and
• affixing the closure to the container body by screwing the overcap onto the container body and induction-sealing the membrane to the upper edge of the container body in a substantially gas-tight manner so as to enclose the product in the container.