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Patent Granted A device for dosing and dispensing a detergent composition. The device is defined by an outer container comprising at least an opening in fluid communication with an outer atmosphere. The device has an inner reservoir comprising at least an opening. The inner reservoir of the device comprises no opening that opens directly into the outer atmosphere. This ensures that during a washing cycle, water entering into the interspace of the device will come into contact with the detergent only through the inner reservoir openings, leading to gradual dilution of the detergent in water, followed by its spreading into the interspace serving as a dilution chamber. From there, the diluted detergent composition may become evenly and gradually distributed over the different laundry pieces present in the agitating washing machine drum during a washing cycle. The problem this invention solves is that it allows for better control over the distribution of detergent in space and time inside the washing machine drum during a washing cycle. Compared to existing technologies it ensures longer residence time of the diluted detergent inside of the interspace and thus also a better control over its distribution in space and time inside the washing machine drum during a washing cycle.