A rim block cage for receiving solid or gel-like preparations, comprising • a plurality of containers (3a, 3b, 3c, 3d) arranged in a row with respect to one another, in relation to a longitudinal center axis of the rim block cage, for receiving at least one preparation (4a, 4b, 4c, 4d), it being possible for the containers (3a, 3b, 3c, 3d) to be positioned underneath the toilet bowl rim such that, when the toilet is flushed, flushing water can flow over said containers and at least one inlet opening (5a, 5b, 5c, 5d) and one outlet opening (6a, 6b, 6c, 6d) being formed in a container wall for the flushing water, • the containers (3a, 3b, 3c, 3d) each having an associated vertical axis when positioned in the toilet bowl, • a retainer for fastening the rim block cage to the toilet bowl rim, • a flushing water guide element being arranged and configured on the rim block cage such that flushing water acts on the flushing water guide element during flushing and the flushing water is fed to the inlet openings (5a, 5b, 5c, 5d), characterized in that • the containers (3a, 3b, 3c, 3d) are cylindrical, the axis of rotation thereof being perpendicular to the vertical axis, • the inlet openings (5a, 5b, 5c, 5d) are arranged asymmetrically with respect to the relevant vertical axis of the containers (3a, 3b, 3c, 3d) and, owing to angled installation of each container of the rim block cage, are arranged at an installation angle (α) to the longitudinal central axis of 1°-60°, preferably 5°-45°, particularly preferably 10°-30°, and so two different amounts of active ingredient can be released from the rim block cage, depending on the direction from which the flushing water impacts on the rim block cage, by positioning the rim block cage on opposite sides of the toilet bowl. • a plurality of containers (3a, 3b, 3c, 3d) arranged in a row with respect to one another, in relation to a longitudinal center axis of the rim block cage, for receiving at least one preparation (4a, 4b, 4c, 4d), it being possible for the containers (3a, 3b, 3c, 3d) to be positioned underneath the toilet bowl rim such that, when the toilet is flushed, flushing water can flow over said containers and at least one inlet opening (5a, 5b, 5c, 5d) and one outlet opening (6a, 6b, 6c, 6d) being formed in a container wall for the flushing water, • the containers (3a, 3b, 3c, 3d) each having an associated vertical axis when positioned in the toilet bowl, • a retainer for fastening the rim block cage to the toilet bowl rim, • a flushing water guide element being arranged and configured on the rim block cage such that flushing water acts on the flushing water guide element during flushing and the flushing water is fed to the inlet openings (5a, 5b, 5c, 5d), • the containers (3a, 3b, 3c, 3d) are cylindrical, the axis of rotation thereof being perpendicular to the vertical axis, • the inlet openings (5a, 5b, 5c, 5d) are arranged asymmetrically with respect to the relevant vertical axis of the containers (3a, 3b, 3c, 3d) and, owing to angled installation of each container of the rim block cage, are arranged at an installation angle (α) to the longitudinal central axis of 1°-60°, preferably 5°-45°, particularly preferably 10°-30°, and so two different amounts of active ingredient can be released from the rim block cage, depending on the direction from which the flushing water impacts on the rim block cage, by positioning the rim block cage on opposite sides of the toilet bowl.