The present invention relates to a device comprising a cassette (1) having an opening (2) in an axial direction of the cassette (1) and a support surface (3) transverse to the axial direction and extending around the opening (2) of the cassette (1), the cassette (1) being capable of receiving a cup in the opening with a outwardly extending flange of the cup supported by the support surface (3), and a supporting plate (4) having an opening in a normal direction of the supporting plate (4), wherein the cassette (1) comprises a resilient or flexible material, and a slot in which a part of the supporting plate (4) is received in close contact without cavities.