A fluid holder (10, 90) comprising: a housing (12, 92) having an inner surface (14, 94) defining a cavity (16, 96), the housing (12, 92) defining at least one fluid outlet (50, 52, 54, 56, 120) in communication with the cavity (16, 96); a piston (22, 104) in slidable engagement with the inner surface (14, 94), the piston (22, 104) having first (28, 106) and second (30, 108) opposed surfaces with a threaded opening (38, 118) extending between the first (28, 106) and second (30, 108) opposed surfaces of the piston (22, 104), the first surface (28, 106) of the piston (22, 104) and the inner surface (14, 94) of the housing (12, 92) defining a fluid chamber (32, 110) in the cavity (16, 96) in communication with the at least one fluid outlet (50, 52, 54, 56, 120), and the piston (22, 104) being movable to expand or contract the fluid chamber (32, 110); and a threaded member (40, 122) engageable with the threaded opening (38, 118) of the piston (22, 104), a first portion (42, 124) of the threaded member (40, 122) extending from the first surface (28, 106) of the piston (22, 104) into the fluid chamber (32, 110), and a second portion (44, 126) of the threaded member (40, 122) extending from the second surface (30, 108) of the piston (22, 104) away from the fluid chamber (32, 110), characterized in that the threaded member (40, 122) is rotatably coupled to the housing, at a position on the first portion (42, 124) of the threaded member (40, 122) and spaced apart from the piston (22, 104), for rotation in the threaded opening (38, 118) of the piston (22, 104) such that rotation of the threaded member (40, 122) in a fluid chamber contracting direction causes a force to be exerted by the first portion (42, 124) of the threaded member (40, 122) on the housing (12, 92) and on the piston (22, 104) to move the piston (22, 104) in the cavity (16, 96) to contract the fluid chamber (32, 110). a housing (12, 92) having an inner surface (14, 94) defining a cavity (16, 96), the housing (12, 92) defining at least one fluid outlet (50, 52, 54, 56, 120) in communication with the cavity (16, 96); a piston (22, 104) in slidable engagement with the inner surface (14, 94), the piston (22, 104) having first (28, 106) and second (30, 108) opposed surfaces with a threaded opening (38, 118) extending between the first (28, 106) and second (30, 108) opposed surfaces of the piston (22, 104), the first surface (28, 106) of the piston (22, 104) and the inner surface (14, 94) of the housing (12, 92) defining a fluid chamber (32, 110) in the cavity (16, 96) in communication with the at least one fluid outlet (50, 52, 54, 56, 120), and the piston (22, 104) being movable to expand or contract the fluid chamber (32, 110); and a threaded member (40, 122) engageable with the threaded opening (38, 118) of the piston (22, 104), a first portion (42, 124) of the threaded member (40, 122) extending from the first surface (28, 106) of the piston (22, 104) into the fluid chamber (32, 110), and a second portion (44, 126) of the threaded member (40, 122) extending from the second surface (30, 108) of the piston (22, 104) away from the fluid chamber (32, 110), characterized in that the threaded member (40, 122) is rotatably coupled to the housing, at a position on the first portion (42, 124) of the threaded member (40, 122) and spaced apart from the piston (22, 104), for rotation in the threaded opening (38, 118) of the piston (22, 104) such that rotation of the threaded member (40, 122) in a fluid chamber contracting direction causes a force to be exerted by the first portion (42, 124) of the threaded member (40, 122) on the housing (12, 92) and on the piston (22, 104) to move the piston (22, 104) in the cavity (16, 96) to contract the fluid chamber (32, 110).