Plug for sealable container

An apparatus for sealing a container for keeping vacuum therein, the apparatus comprising:

• a lid including
• an upper portion;
• a lower portion opposed to the upper portion, the lower portion covering an opening of the container when used in cooperation with a container;
• and
• a lid opening therethrough allowing air circulation from the container and the environment;
• a plug blocking the lid opening in a vacuumed configuration when the lid assembly is used in conjunction with a container, the plug allowing air to move from the container to the environment in an air-pumping configuration and allowing air to move from the environment to the container in a vacuum-releasing configuration, the plug comprising a plurality of sealing stages for keeping vacuum in the container when in the vacuumed configuration.