Abstract: A holder for an inhaler article. The holder comprises a housing comprising a housing cavity. The holder further comprises an engagement member located at least partially within the housing cavity. The engagement member is movable relative to the housing between an upstream position and a downstream position. The engagement member comprised a first follower member. The housing comprises a first guide and a first latch, the first follower member is arranged to follow the first guide between a first position, a second position, and a third position. The first latch is arranged such that the first follower member may pass from the first position to the second position, but may not return to the first position without first passing the third position. An inhaler system comprises a holder and an inhaler article.