A dummy container for controlling a container filling device includes a base, a housing, a locking mechanism, and an actuating mechanism. The housing is attached to the base and is movable in view of the base between a first extended position and a second collapsed position. The housing defines a fluid inlet extending into a pressure chamber. The locking mechanism is arranged between the housing and the base allowing locking of the housing in the first extended position in view of the base. The actuating mechanism is designed to release the locking mechanism between the base and housing upon a pressure increase in the pressure chamber, thereby triggering the movement of the housing into the second collapsed position in view of the base.