Abstract: A cover for sealing and unsealing a container. The cover has a first surface adapted to be removably adhered to the container to seal an interior of the container. The cover also has a second surface opposite the first surface. The first and second surfaces define a thickness between the first and second surfaces. The first and second surfaces further define an aperture extending through the first and second surfaces. The cover further has a first tab protruding from the second surface. The first tab is configured to move from a first position sealing the aperture to a second position unsealing the aperture. The aperture permits fluid communication between the interior and an external environment. The cover additionally has a second tab spaced from the first tab. The second tab is adapted to be grasped by a user to remove the cover from the container.