Patent ID: 8662342

Claim:
A plug device for a container, the plug device comprising: a flexible plug body that is sized to be positioned within the container for releasably sealing material into the container, wherein the flexible plug body has a plurality of seals that conform to contours of an interior wall of the container and that simultaneously fit within the container and exert resistance pressure against the interior wall of the container when the plug device is inserted into the container, and wherein the plurality of seals comprises a primary seal and a lower seal that is located below the primary seal along the radial axis of the flexible plug body, wherein the primary seal has a flexible tubular structure with an outwardly facing curved surface, wherein the lower seal covers a top surface of the material within the container when the plug device is inserted into the container, and wherein the lower seal has a flexible outer edge for operating in conjunction with the primary seal to improve the releasable sealing by extending outwardly from a center portion of the flexible plug body further than the primary seal when the plug device is not inserted into the container, and curling upwardly toward the primary seal to compress one side of the lower seal into the outwardly facing curved surface of the primary seal and to compress the other side of the lower seal into the interior wall of the container when the plug device is inserted into the container; a plug handle section attached to the flexible plug body and extending from the flexible plug body to a free end, wherein the plug handle section is arranged to facilitate inserting the flexible plug body into the container to the top surface of the material within the container.