EXPIRATION DATE INDICATING STOPPER

摘要

The present invention relates to an expiration date indicating stopper and, more specifically, to an expiration date indicating stopper including a developing medium member forming a moving path of a developing material between a first stopper showing the inside and a second stopper colored with colors, moving the developing material along the moving path and displaying a moving state of the developing material via the first stopper externally positioned, thereby enabling a user to determine a usage period of the developing material included in a container and to easily check that the expiration date has arrived if it does.