1. A nipple with a base (2) and a hollow and soft elastic mouthpiece (3) protruding from it with a region adjacent to the sky, characterized in that the mouthpiece (3) contains a fully or partially including region adjacent to the sky, a flat, refined region (15) ), in which the mouthpiece (3) has a smaller wall thickness than in the regions adjacent to it. 2. A nipple according to claim 1, characterized in that the refined region (15) is completely surrounded by a region adjacent to the sky, or congruent to a region adjacent to the sky, or includes a region adjacent to the sky. A nipple according to claim 1, characterized in that the refined region (15) is surrounded by at least one strip-like reinforcing element (16, 17) .4. A nipple according to claim 1, characterized in that, due to its shape, it has a preferred rotational position in the mouth, and the refined region (15) is present only in the region adjacent to the sky, the mouthpiece, which is adjacent to the sky in a preferred rotational position. Nipple according to claim 4, characterized in that the mouthpiece (3) is at least larger in the direction adjacent to the sky and in the area of the teeth in any cross section in the direction of the horizontal axis than in the direction of the horizontal axis. A nipple according to claim 1 or 3, characterized in that the mouthpiece (3) on top contains a dome (11) for fitting to the sky and / or below contains a bevel (12) for fitting to the tongue and / or at the border with the base contains a waist (13 ) to place the tooth area in it. 7. Nipple according to claim 6, characterized in that the refined region (15) or the reinforcing element (16, 17) in a vertical longitudinal section passes through the mouthpiece (3) from the top of the dome (11) to the waist (13) .8. Nipple according to claim 1 or 3, characterized in that the refined region (15) has an elliptical contour, if we consider it from a position located vertically1. Соска с основанием (2) и выступающим
