Abstract: A dispenser pack for a free-flowing medium includes a metering pump, a container that is tightly connected to said metering pump and that can be ventilated by the pump, and a closing cap. The free-flowing medium within the container is enclosed by a bag made of a flexible material with an upper aperture rim of the bag being tightly connected in one part/piece to a wall of the container, and a space between the inside of the container wall and the outside of the bag being at atmospheric pressure.

Abstract: A dispenser pack comprising a metering pump and a container that is tightly connected to said metering pump and that can be ventilated by the pump, comprising a closing cap that comprises a cylindrical wall that encloses an axial aperture; a retainer for attaching the pump within the aperture of the closing cap; a pump housing comprising a pump cylinder; a pump piston which is arranged in the pump chamber so as to be slidable in a sealed manner and comprises a piston shaft; an axial outlet channel that extends through the piston shaft and the pump piston and connects the pump chamber with a dispensing aperture of the activation head; an inlet valve and an outlet valve for the free-flowing medium; and a helical compression spring which impinges on the pump piston in the direction of its home position, wherein the volume of the container that contains the free-flowing medium can be adjusted to the decrease of the volume of the free-flowing medium dispensed from the container; and the inner hole rim of the seal