US Patent 7938286 Container system

A container that may be used for retaining and dispensing matter is provided. The container includes a closure having a downwardly depending skirt with a plurality of space apart vertical projections supported at an inside surface of the skirt. The projections are configured to releasably engage an open end of the container for securing the closure to the container. The projections include a guide surface for guiding the projections over the open end of the container and a retaining surface for retaining the projections on the container.