The disclosure relates to a the cassette (10, 10') comprise one or more cells (14) for containing the content, the cells (14) being arranged circumferential, and each cell (14) comprises a bottom (15) and side walls (16), and an open end (17), wherein the circumferentially arranged cells (14) have at least one blind space (18) between two adjacent cells (14) with a width corresponding at least to the width of one cell (14), the cassette (10, 10') being substantially circular and having an inner circular opening (19) around which the cells (14) are arranged, and the inner circular opening (19) is provided for being arranged over a corresponding circular shaped motor house (50, 50'), the cassette (10, 10') further comprise a rotationally connected cassette lid disc (11, 11') covering the open end (17) of the cells (14), wherein the cassette lid disc (11, 11') is rotatable relative the cassette (10, 10'), and the cassette lid disc (11, 11') further comprise at least one lid aperture (12) having a size and form substantially corresponding to or larger than the open end (17) of at least one of the cells (14). The disclosure further relates to a dispenser (20, 20') for monitoring and dispensing doses of content, a filling device for filling a cassette (10, 10'), a system for operating a dispenser (20, 20') and a method for operating a dispenser (20, 20').