Storage tank and dosing device

Storage tank (2) for accommodating a liquid detergent or additive washing or rinsing, comprising: a housing (20), configured to be inserted along an insertion direction (4) in a receptacle (3) of a domestic appliance (1) that conducts water, in particular a washing machine and a coupling element-side tank (21), which is configured to engage with the domestic appliance (1) via a coupling element (31) side receptacle disposed in the receptacle (3) to form a coupling device, such that the additive can flow through the coupling device to the household appliance (1), a locking element (22) which is configured to constitute latching connection with an element of opposed locking (32) of the domestic appliance (1) arranged in the receptacle (3), inserting the housing (20) in the receptacle (3) and fixing the housing (20) to the receptacle ( 3 ) Such that it can be released, wherein the housing (20) has a cross-sectional plane parallel to the insertion direction (4) a cross-sectional profile such that the coupling element side tank (21) and the element locking (22) are arranged on the cross-sectional profile in the same cross-sectional plane in the housing (20) and the coupling side tank (21) and the locking element (22) are arranged on ends opposite a diagonal of the cross-sectional profile in the housing (20) and the locking element (22) and the coupling side tank (21) are arranged perpendicularly to a front side of the housing (20), observed horizontally, in the center.