| 主权项 |
1. A teat comprising a stem and a nipple, wherein a structured area comprising a primary undulating surface is provided on at least a partial region of the stem or nipple, wherein the primary undulating surface is sinusoidal and has a surface roughness Rz of greater than 100 μm, wherein the primary undulating surface comprises elevated regions and depressed regions, and wherein the primary undulating surface comprises one or more secondary structured areas located only along the sinusoidal shape of the primary undulating surface, wherein the one or more secondary structured areas comprise a secondary undulating surface comprising a plurality of sloping regions, a plurality of elevated regions and a plurality of depressed regions,
wherein an average distance between adjacent elevated regions of the primary undulating surface is greater than an average distance between adjacent elevated regions of the secondary undulating surface; and wherein a height between an elevated region and a depressed region of the secondary undulating surface is less than a height between an elevated region and a depressed region of the primary undulating surface. |
