An ink tank cartridge for use in an ink jet recorder has a container having exterior walls, a porous member is stored in the container, an ink supply port that extends through one of the exterior walls of the body to supply ink to the exterior of the cartridge, and a packing member, disposed within the ink supply port and having an opening therethrough and a rib formed on a upper surface. The tether controls a disposition of the capsule within a body lumen such as the esophagus. A fuel bundle chamber may be between an inner surface of the outer conduit and an outer surface of the inner conduit and may at least partially laterally surround the inner conduit. The inner surface supports the bobbins on rotation thereof to prevent high frictional torques from the bearings of the bobbins. The steam condenses on an external surface of the at least one conduit, and the condensed water is then extracted from the plant. The method is useful for shunt patency assessment, CSF valve adjustment procedures and CSF flow measurements related to CSF over drainage.