A hinged container is disclosed, including a base, a lid, and a hinge joining the base and lid, allowing the lid to pivot open or closed relative to the base. One of the base and the lid has a circular, outwardly tapered outer seal member disposed at least partially within its outer perimeter. The other of the base and the lid has a circular, inwardly-tapered inner seal member disposed at least partially within its outer perimeter. The inner and outer seal members are positioned to engage concentrically to wedge the inwardly and outwardly tapered surfaces together and form a seal when the base and the lid are closed, and to disengage concentrically to part the inwardly and outwardly tapered surfaces when the base and the lid are opened.