FIELD: medicine.SUBSTANCE: group of inventions relates to the field of medicine and can be used for baby feeding. A nipple unit contains a nipple (4), a fastening device (2, 3) for fastening the nipple (4) on a vessel (1) for liquid and a ventilation valve (23, 310), with the fastening device containing the first fastening element (2) and the second fastening element (3), and the ventilation valve having, at least, the first part (23) of the valve and the second part (310) of the valve. The first and second fastening elements in the zone of the ventilation valve (23, 310) are made rigid. The first part (23) of the valve is located in the first fastening element (2) and the second part (310) of the valve is located in the second fastening element (3) or the ventilation valve (23, 310) is made with a possibility of opening or closing relative to the second fastening element (3), with the first part (23) of the valve and the second part (310) of the valve being located in the first fastening element (2). The group of inventions also relates to the said nipple version, in which the first fastening element and the second fastening element are made with a possibility of detachable connection with another plug connection, as well as to the version, where the first fastening element contains a ring base and formed in the said base conic projection.EFFECT: group of inventions provides reliable functioning even under small differences of pressure between the bottle and the environment.18 cl, 12 dwgГруппа изобретений относится к области медицины и может быть использована для кормления ребенка. Узел соски содержит соску (4), устройство крепления (2, 3) для крепления соски (4) на сосуде (1) для жидкости и вентиляционный клапан (23, 310), причем устройство крепления содержит первый элемент (2) крепления и второй элемент (3) крепления, а вентиляционный клапан (23, 310) имеет, по меньшей мере, первую часть (23) клапана и вторую часть (310) клапана. Первый и второй элементы креп
