A plastic mixing bowl has a bowl body with a bottom side and an elastic annular seal that is provided with a peripheral region that in radial direction of the annular seal is positioned inwardly and is connected air-tightly to the bottom side of the bowl body. The annular seal has a lip extending from the peripheral region at least partially in radial direction outwardly. The lip is moveable into various positions and has a lower side forming a placing face by which the mixing bowl is supported on a setup surface. Annular seal and bottom side of the bowl body form together a suction cup that delimits a cavity varying in size depending on a position of the lip. The annular seal is repositionable from a position of use to a non-use position and in the non-use position bears flat against an exterior surface of the bowl body.