A flow-limiting device that controls the distribution of unitary products from a container for holding said unitary products includes at least one dispensing opening, a body made of a polymeric material with an entry side, a dispensing side and a peripheral side extending in an axial direction of the body. The peripheral side has a lower and an upper axial end, the entry side has at least in part, a concave shape when viewed onto the entry side with at least one guiding surface. The dispensing side has at least in part, a concave shape when viewed onto the dispensing side. The dispensing opening is at an axial position between and spaced from the axial positions of the lower and upper axial end, wherein the entry side and/or the dispensing side include a plurality of elevated regions, which are arranged to define the concave shape.