Stopper for use in e.g. additive bottle, has stopper cup including lower wall closing lower end of inner tubular wall, and push end for pushing portion of connection part of lower wall when stopper is in cutting position

摘要

The stopper (5) has a stopper cup (4) including an inner tubular wall and a lower wall closing a lower end of the inner tubular wall. A tubular cutting body (52) extends downward from a peripheral end of an upper panel (51) towards the lower wall, where the stopper moves downward from a non-cutting position towards a cutting position when the upper panel is compressed. A push end (525) pushes a portion of a connection part of the lower wall when the stopper is in the cutting position.