Abstract: A mechanism for releasably retaining an article, e.g. a liquid dispenser, with a base portion is disclosed, in which the dispenser includes a protrusion releasably engageable with the base portion, and the base portion includes locking means adapted to prevent disengagement of the dispenser from the base portion, and the locking means includes a ring which is movable, e.g. by rotation or swiveling action, relative to the base portion to lock or unlock the dispenser from said base portion.