An improved structure of culture bottle (2).A bottle cap and a bottle body；The cap is provided with an internal thread section.The bottle body is provided with an external thread section.The bottle cap is fixedly integrated with the external thread section of the bottle body through the internal thread section.It is characterized in that the cap is provided with a closed end with a diameter slightly larger than the inner diameter of the cap under the internal thread section.The bottle body is provided with a groove under the external thread section.The groove extends outwards to form a plane section.The groove is used for a rubber washer to install.It is closed on the outer edge of the rubber gasket through the closed end cap of the bottle cap.And the extended plane segment extends the distance of arrival,In the process of disinfection, the cap and the body of the bottle are covered with rubber washers so that they do not move.一種培養瓶結構改良(二)，一瓶蓋及一瓶身所構成；該瓶蓋設置有內螺紋段，該瓶身設置有外螺紋段，該瓶蓋藉由內螺紋段與瓶身的外螺紋段螺鎖固定一體；其特徵在於：該瓶蓋於內螺紋段下方設有直徑略大於瓶蓋內側直徑之一封閉端，該瓶身在外螺紋段下方設置有一溝槽，該溝槽向外延伸形成一平面段，該溝槽供一橡膠墊圈安裝其中，透過瓶蓋之封閉端蓋闔於橡膠墊圈外緣，並且延伸的平面段延長抵止的距離，使得消毒過程中瓶蓋與瓶身包覆橡膠墊圈使其不位移。
