A bottle teat, in particular for infants and small children, comprising: A nipple sleeve having a hollow nipple with at least one through-hole for liquid nutrition that is connected at the bottom to a hollow nipple sleeve which is connected at the bottom to a substantially annular disc-shaped nipple flange that is connected to the nipple sleeve to be fastened to the fastening edge of a bottle by means of a fastening ring which serves at the bottom with an annular disc-shaped ring flange overlapping the nipple flange, A contact area projecting downward or upward from the nipple flange, or from the nipple sleeve above the nipple flange outward into the area for placing a ring flange, and A lip valve that is opened when the nipple flange is not fastened to a bottle and that is arranged in a deforming area next to the contact area so that, when the nipple flange is fastened by means of a fastening ring to a bottle, the deformation of the nipple flange and/or nipple sleeve that arises from pressing the fastening ring against the contact area closes the valve.
