Patent ID: 8317043

Claim:
A beverage container comprising: a receptacle having a central axis, a neck that defines an opening and a resilient lid having a closure plate which plate spans the opening of the neck, a downwardly facing annular shoulder on the outer surface of the neck, the lid having an annular web extending over the upper end of the neck, an annular skirt extending downwardly from the outer end of said web, an annular flange integral with the lower end of the skirt, a resilient hinge connecting the flange to the lower end of the skirt, the flange having a distal free end, the flange being rotatable from a downwardly extending position having the free end facing away from the web in an unassembled state to an upwardly extending position having the free end facing the web in an assembled state, the upper edge of the neck deforming the web, the upwardly facing free end of the flange engaging the downwardly facing shoulder, the skirt being in tension between the shoulder and the free end of the flange, the resilient hinge forcing the side surface of the flange against a side surface of the container, a first gas seal provided by the web deforming engagement of the web and the upper end of the neck, a second gas seal provided by the engagement of the free end of the flange in the upwardly facing position and the shoulder, and a third gas seal provided by engagement between the side surface of the free end of the flange and the side surface of the receptacle under force provided by the resilience of said hinge.