An accessory for use with a container of a food processing system includes a body positionable within a base of the food processing system, said body having a first side and a second side, an opening formed in said body, a member configurable with said opening to selectively seal said opening, said member being arranged at said second side of said body, a vacuum sealing assembly for sealing a chamber of the container, and a release mechanism operable to selectively fluidly couple said chamber to an ambient atmosphere.