A measuring cap (1) comprising a containing element (2), which comprises at least one peripheral chamber (4) that contains a substance to be measured and is provided with a bottom portion (41) that can be removed to discharge the measured substance, and an opening element (1) revolvingly mounted with respect to the containing element (2) in such manner that the two elements (1, 2) can rotate mutually without moving in axial direction the measuring cap (1) also comprises a tooth (3) situated in peripheral position in said opening element (1) in such manner to push an edge of the bottom portion (41) of the peripheral chamber (4) in a parallel direction to the bottom portion (41) during the mutual rotation between the containing element (2) and the opening element (1), thus removing the bottom portion (41) of the peripheral chamber and discharging the substance to be measured.
