Joint

The invention relates to a lid (7) that is pivotally attached to a filler neck (1) of a windshield washer fluid reservoir by means of a hinge (8). The invention proposes designing the hinge (8) with pins (10) that are received with clearance in bearing holes (15). During injection molding, the clearance is occupied by sliders of an injection molding tool, so that the lid (7) together with the filler neck (1) can be injection molded in a single step.