A piercing member protection device having a longitudinal axis, wherein said piercing member protection device comprises: (a) a protection chamber to protect at least the tip of a piercing member, (b) a first and a second member (10, 20) arranged to each other, said first member having a first and a second end (11, 12) and an inner and outer surface (13, 14), and said second member having a first and a second end (21, 22) and an inner and outer surface (23, 24), wherein said first member is arranged to slide with respect to said second member between a secured position, in which at least the tip of said piercing member is enclosed within the protection chamber so as to prevent said tip of said piercing member from exposure, and an unsecured position, in which said tip of said piercing member is arranged outside said protection chamber, and wherein said first member is arranged to turn with respect to said second member between a locked position and an unlocked position so that when said first member is in said locked position said first member is substantially unable to slide along said longitudinal axis and when said first member is in said unlocked position said first member is enabled to slide along said longitudinal axis, and (c) a third member arranged to said second member, said third member having a first and a second end (31, 32) and an inner and outer surface (33, 34), wherein said first end of said third member comprises connection means for connecting to a first fluid container, characterized in that said second member is arranged to at least partly encompass said outer surface of said third member and, wherein said first end of said second member comprises engagement means arranged to engage with said first container thereby preventing said second member from turning in a clock-wise or anti-clock wise direction. (a) a protection chamber to protect at least the tip of a piercing member, (b) a first and a second member (10, 20) arranged to each other, said first member having a first and a second end (11, 12) and an inner and outer surface (13, 14), and said second member having a first and a second end (21, 22) and an inner and outer surface (23, 24), wherein said first member is arranged to slide with respect to said second member between a secured position, in which at least the tip of said piercing member is enclosed within the protection chamber so as to prevent said tip of said piercing member from exposure, and an unsecured position, in which said tip of said piercing member is arranged outside said protection chamber, and wherein said first member is arranged to turn with respect to said second member between a locked position and an unlocked position so that when said first member is in said locked position said first member is substantially unable to slide along said longitudinal axis and when said first member is in said unlocked position said first member is enabled to slide along said longitudinal axis, and (c) a third member arranged to said second member, said third member having a first and a second end (31, 32) and an inner and outer surface (33, 34), wherein said first end of said third member comprises connection means for connecting to a first fluid container,