a thermoplastic closure for a fluid container which has a flexible needle - like dispensing extension continuous with and extending from the base and ending at a tip wherein the extension has an internal cylindrical cavity with an interior aperture positioned within the base and an exterior aperture positioned at the tip . the flexible , needle - like extension facilitates ease in refilling reservoirs such as ink - jet cartridges and facilitates control over the rate of flow of the ink from the container into the reservoir .