A rigid body (3) for delimiting the volume of medical fluid with an inner member of the wall, and a membrane (5) covering at least the opening of the rigid body and thereby creating a fluid-tight lid, A fluid container for a medical fluid dispensing device, wherein the portion corresponds to a measurement area and the membrane further covers a portion of the outer member of the wall of the rigid body. The membrane includes a flexible measuring member (11) corresponding to the opening of the rigid body, an attachment member (13) secured to the rigid body, and a second connecting the flexible measurement member to the attachment member. Said second member is a rigid member (14) whose upper member is connected to a flexible measuring member, said rigid member further comprising a sealing surface (18) And a deformable member (15) connecting the rigid member to the mounting member. The fluid container further includes a first gap (17) located between the rigid member and the rigid body, wherein the first gap is applied when a force is applied on the sealing surface to deform the deformable member. Sized to receive at least a portion of the rigid member.その壁の内側部材で医療流体の容積の境界を定めるための剛性本体（３）と、剛性本体の少なくとも開口部を覆い、それにより流体耐密な蓋を生み出す膜（５）とを含み、開口部が測定エリアに対応し、膜は、剛性本体の壁の外側部材の一部分をさらに覆う、医療流体投薬デバイス用の流体コンテナ。膜は、剛性本体の開口部に対応する可撓性の測定部材（１１）と、剛性本体に固定された取付け部材（１３）と、可撓性の測定部材を取付け部材に連結する第２の部材（１２）とを含み、該第２の部材は、その上部部材が可撓性の測定部材に連結される剛性部材（１４）であって、封止表面（１８）をさらに備える前記剛性部材と、該剛性部材を取付け部材に連結する変形可能な部材（１５）とを含む。流体コンテナは、剛性部材と剛性本体の間に位置する第１の間隙（１７）をさらに含み、該第１の間隙は、力が封止表面上に加えられ変形可能な部材を変形させた場合、剛性部材の少なくとも一部を受けるように寸法設定される。
