Container stopper capable of being rapidly opened and closed

A container stopper for a container and capable of being rapidly opened and closed, comprising:

• a columnar plug body including a plunger rod having a bottom provided with a base for being disposed in the container, a shape and size of the base corresponding to one of a shape and size of a straight section of the container or a shape and size of a smallest cross section of the container;
• an annular plug body arranged above the base, the annular plug body and base configured to move relative to each other along an axial direction of the container;
• and
• a foldable and deformable elastic seal cartridge arranged between the annular plug body and the base, the base and annular plug body are configured to press the elastic seal cartridge when an external force is applied to a push-pull part such that the elastic seal cartridge radially expands outward to form a seal ring between an inner wall of the container and an outer contour of the base, wherein
• when the external force on the push-pull part is released, an elastic force of the elastic seal cartridge causes an increase in a distance between the base and the annular plug body that restores the elastic seal cartridge to a less bent state, and
• an outer contour size of the seal ring is larger than one of an inner surface size of the straight section of the container or the smallest cross section of the container, and the seal ring and the base together form a sealing layer for the rapid closing of the container.