The fluid dispenser (P) the open part (31) the stopper component in order to install (C), the cover that the aforementioned stopper component the fluid dosage mouth (17) the base itself which was formed (1) and the base itself the assembly part which in (1) is installed in stationary state (20) with, and, the dosage mouth (17) the closing cover in order to close (25) being as feature, is connected to the assembly part the hinge (26) by (25) with, to possess, as a feature aforementioned cover (25) concerning, the part (20) With the cover (25) with it is made, as the detail part the cover (25) initial condition, before opening the cover for the first time, at point in time, the assembly part (20) we are connected one material bridge (28) by at least, the aforementioned bridge (28) the aforementioned stopper component that it is something which is destroyed to the occasion where it is opened for the first time.流体ディスペンサ(P)の開口部(31)に設置するためのストッパ部材(C)であって、前記ストッパ部材は、特徴として、流体投与口(17)が形成されたベース本体(1)と、ベース本体(1)に静止様態で設置される組立部品(20)と、そして、投与口(17)を閉じるための閉じ蓋(25)であって、ヒンジ(26)によって組立部品に接続されている、という蓋(25)と、を有し、前記蓋(25)については、特徴として、部品(20)と蓋(25)とが単一部品として作られており、蓋(25)は初期状態、初めて蓋が開けられる前の時点では、少なくとも1つの素材ブリッジ(28)によって組立部品(20)に接続されており、前記ブリッジ(28)は初めて開けられる際に破壊されるものである、という前記ストッパ部材。