A nursing bottle (1) comprises a bottle main portion (11), which is open at the upper end and the lower end, the first screw thread (112) provided at the lower end of the outer wall of the bottle main portion (11) a bottle bottom cover (14), the inner wall of which is provided with the second screw thread (142) for connecting with the first screw thread (112). The first screw thread (112) or the second screw thread (142) is segmented. An elastic sealing cover (15) is provided between the lower end of the bottle main portion (11) and the bottle bottom cover (14), which comprises a bottom support (154), an annular sealing ring (151) and an annular fixing ring (152). The annular sealing ring (151) and an annular fixing ring (152) are provided upon the bottom support (154). An annular groove (153) is located between the annular sealing ring (151) and an annular fixing ring (152). The diameter of annular fixing ring (152) is larger than that of the annular sealing ring (151). A first gap is provided between the annular fixing ring (152) and the outer wall of the bottle main portion (11). The second gap is provided between the annular sealing ring (151) and the inner wall of the bottle main portion (11). When the nursing bottle is upstanding, the annular sealing ring (151) is closely connected with the inner wall of the bottle main portion (11). The nursing bottle further comprises an open ventilating means. When the nursing bottle is in feeding position, the gap between the bottle main portion (11) and the second screw thread (142), the first gap, the open ventilating means and the second gap are communicated with each other.Linvention concerne un biberon (1) qui comprend une partie principale de biberon (11), qui est ouverte à lextrémité supérieure et à lextrémité inférieure un premier filetage (112) formé à lextrémité inférieure de la paroi externe de la partie principale de biberon (11) un couvercle de fond de biberon (14), dont la paroi interne est munie dun second
