A product advancing device with (a) a pusher which - comprises a first pushing element (16.1) and at least a second pushing element (16.2) that are interconnected in one hinge, and - comprises at least one spring, - wherein the pushing elements can be moved relative to one another into an extended arrangement and, as a result of displacement in a displacement plane in which an angle (α) changes between the two pushing elements, from the extended arrangement into a buckled arrangement, - wherein the spring pre-tensions the pushing elements into the extended arrangement and - the pusher comprises a free end, by means of which a pressure can be exerted onto a stack on products, and a fixed end that is situated opposite the free end, and (b) a slide rail to which the fixed end is secured, characterised by the fact that (c) the slide rail comprises a slide path and (d) the pusher has - a first slide element, which is fixed to the first pushing element (16.1), at its fixed end and - a second slide element that is fixed to the second pushing element (16.2), (e) the slide elements (40, 42) being arranged such that the pusher - can be secured with the first glide element and the second glide element in the slide path such that the displacement plane runs at least primarily parallel to a base panel, and - can be secured with the first slide element in the slide path such that the displacement plane runs at least primarily perpendicular to the base panel. (a) a pusher which - comprises a first pushing element (16.1) and at least a second pushing element (16.2) that are interconnected in one hinge, and - comprises at least one spring, - wherein the pushing elements can be moved relative to one another into an extended arrangement and, as a result of displacement in a displacement plane in which an angle (α) changes between the two pushing elements, from the extended arrangement into a buckled arrangement, - wherein the spring pre-tensions the pushing elements into the extended arrangement and - the pusher comprises a free end, by means of which a pressure can be exerted onto a stack on products, and a fixed end that is situated opposite the free end, and - comprises a first pushing element (16.1) and at least a second pushing element (16.2) that are interconnected in one hinge, and - comprises at least one spring, - wherein the pushing elements can be moved relative to one another into an extended arrangement and, as a result of displacement in a displacement plane in which an angle (α) changes between the two pushing elements, from the extended arrangement into a buckled arrangement, - wherein the spring pre-tensions the pushing elements into the extended arrangement and - the pusher comprises a free end, by means of which a pressure can be exerted onto a stack on products, and a fixed end that is situated opposite the free end, and (b) a slide rail to which the fixed end is secured, characterised by the fact that (c) the slide rail comprises a slide path and (d) the pusher has - a first slide element, which is fixed to the first pushing element (16.1), at its fixed end and - a second slide element that is fixed to the second pushing element (16.2), - a first slide element, which is fixed to the first pushing element (16.1), at its fixed end and - a second slide element that is fixed to the second pushing element (16.2), (e) the slide elements (40, 42) being arranged such that the pusher - can be secured with the first glide element and the second glide element in the slide path such that the displacement plane runs at least primarily parallel to a base panel, and - can be secured with the first slide element in the slide path such that the displacement plane runs at least primarily perpendicular to the base panel. - can be secured with the first glide element and the second glide element in the slide path such that the displacement plane runs at least primarily parallel to a base panel, and - can be secured with the first slide element in the slide path such that the displacement plane runs at least primarily perpendicular to the base panel.