1. A method for selecting a fluid (112) from the reservoir (118), comprising the following stepsa) providing a device (116) selecting the closed configured to sterilize the inner space (122), wherein the inner space (122) is located at least one needle element (138, 140), wherein the interior space (122) is closed at least one perforation adapted to the sealing element (126, 128),b) providing a fluid containing (112) of the tank (118), wherein the reservoir (118) has at least one wall (162) of the tank with at least one perforation adapted to portion (148),c) combining device (116) selecting and reservoir (118), thus adapted to be perforated portion (148) and adapted to perforation sealing element (126, 128) connected to each other so that between operable to perforation portion (148) and adapted to be perforated sealing element (126, 128) there is at least one protected area (166), particularly long-term protection zone (166), the protected area (166) by connecting the substantially impermeable to microorganisms closed from the environment (170)d) a perforation adapted to the perforation of the sealing element (126, 128) and adapted to be perforated portion (148) with the needle member (138, 140), wherein the needle member (138, 140) penetrates through the protected area (166).2. The method of claim 1, wherein the method step b) a fluid (112) is placed in a sterile environment in the tank (118), wherein then at least a step in the method) is carried out in non-sterile surroundings.3. The method of claim 1, wherein the process before step c) is performed at least one preparatory step, while during a preparatory step to protect against bacterial contamination after the method step c) at least one element of the group consisting of an outer side (158) adapted to the perforations of the sealing element (126, 128) outside (154) adapted to be perforated portion (148) and the intermediate space between operable to punching the sealing member (126, 128) and adapted to be p
