Package for a tobacco-containing material with a valve assembly and related packaging method

A packaging method, comprising:

• providing a package, comprising:
• a container comprising a cover and a body portion defining an internal space accessible via an opening;
• and
• a two-way valve assembly configured to allow for a flow of gas and pressure out of the container and a flow of one or more gases into the container to affect an atmosphere within the internal space;
• inserting a tobacco-containing material through the opening into the internal space in the body portion;
• coupling a substantially fluid-impervious barrier film to the container and over the opening of the body portion so as to define a secondary space between the barrier film and the cover when the cover is engaged with the body portion,
• engaging the valve assembly with the barrier film such that the valve assembly is configured to vent from the internal space into the secondary space;
• defining one or more vent channels between the cover and the body portion, the vent channels being configured to vent the secondary space to an external environment when the cover is engaged with the body portion;
• engaging the cover with the body portion so as to cover the opening and substantially enclose the internal space;
• and
• coupling a protective barrier to the barrier film, wherein the protective barrier is configured to separate the tobacco-containing material and the valve assembly.