Screw top for vacuum can or bottle for food or medicine

摘要

The screw top may be for a bottle, can etc. which may store food or medicinal material under vacuum. There is a release mechanism which may be pulled or pushed, e.g. a ring pull. There may be a surface in the screw top with weakened lines to guide tearing when the release mechanism is pulled. Use of the ring pull releases the vacuum in the container, after which the top may be unscrewed from the container.