Bottle cap

The invention relates to a bottle cap. The bottle cap is composed of an outer bottle cap (1), an inner bottle cap (2) and a bottle cap seat (3), wherein the outer bottle cap (1) is connected with the bottle cap seat (3) by virtue of a connecting block, the lower part of the inner bottle cap (2) sleeves the bottle cap seat (3), a water outlet (5) is formed in the inner bottle cap (2), a pressure valve (6) is arranged at the water outlet (5), the pressure valve (6) which is matched with the water outlet (5) is arranged on the inner side of the outer bottle cap (1), and a one-time recognition rubber gasket is further arranged in the butting position of the outer bottle cap (1) and the inner bottle cap (2). 瓶盖，它由外瓶盖(1)、内瓶盖(2)和瓶盖座(3)组成，外瓶盖(1)通过连接块与瓶盖座(3)连接，内瓶盖(2)下部套装在瓶盖座(3)上，内瓶盖(2)设有出水孔(5)，出水孔(5)上设有压力阀(6)，外瓶盖(1)内侧设有与出水孔(5)相匹配的压力阀(6)，外瓶盖(1)与内瓶盖(2)对接处还设有次性识别胶圈。