A metering pump made of plastic for the metered dispensing of liquid andor pasty media from a bottle-like container, can-like container or tube-like container with a follower piston. The enhanced dummy field may include a plurality of encoding blocs that enable OVL measurements to be made throughout the enhanced dummy field. In the moved-out state a roof wall of the expansion element is formed by the side wall that is opened up on hinges and belongs to the basic container. The housing may be entirely of composite material or may comprise in inner metallic housing and an outer overwrap of composite material. The proposed LASER-CSS method utilizes existing CSS wells at some intermediate stage of reservoir depletion. The compounds of the present invention have improved GlcCer synthase inhibition activity and are therefore highly useful in therapeutic methods for treating various conditions and diseases associated with altered glycosphingolipid levels.