A teat unit has a teat (4), a securing device (2, 3) for securing the teat (4) on a liquid container (1), and an air valve (23, 310), the securing device having a first securing part (2) and a second securing part (3). The air valve (23, 310) has a first valve part (23), which is arranged in the first securing part (2), and a second valve part (310), which is arranged in the first or in the second securing part (3). The air valve (23, 310) opens and closes with respect to the second securing part (3) . The valve is preferably a diaphragm valve, and the first valve part is a valve diaphragm. This teat unit functions very reliably even at very small pressure differences between the bottle and the environment. Moreover, the range of function of the various teat units of the same type is relatively narrow, such that different teat units function very similarly and the air valves are actuated at similar pressure differences.一種奶嘴單元具有一奶嘴(4)、一用於將該奶嘴(4)緊固於一液體容器(1)上之緊固裝置(2、3)及一氣閥(23、310)，該緊固裝置具有一第一緊固部分(2)及一第二緊固部分(3)。該氣閥(23、310)具有一配置於該第一緊固部分(2)中之第一閥部分(23)及一配置於該第一緊固部分中或該第二緊固部分(3)中之第二閥部分(310)。該氣閥(23、310)相對於該第二緊固部分(3)打開及閉合。該閥較佳為一隔膜閥，且該第一閥部分為一閥隔膜。此奶嘴單元即使在瓶與環境之間的極小的壓力差下亦極可靠地發揮作用。此外，同一類型之各種奶嘴單元之作用之範圍相對狹窄，以使得不同奶嘴單元極類似地發揮作用，且該等氣閥在類似的壓力差下致動。
