A novel mold and slide apparatus system comprises at least a first mold member and a second mold member that together define an internal cavitation. A slide apparatus is mounted on the first mold member for moving an insert member into and out of an internal cavitation in the first mold member. The slide apparatus comprises a main body having a drive cylinder defining a drive-cylinder axis and a carrier cylinder defining a carrier-cylinder axis. A drive piston is disposed in sealed sliding relation in the drive cylinder for movement along the drive-cylinder axis between a start position and a fluid displacement position. a carrier piston is disposed in sealed sliding relation in the carrier cylinder for movement along the carrier-cylinder axis between a retracted position and an extended position. The insert member is connected to the carrier piston for movement therewith for engaging the internal cavitation when the carrier piston is in the extended position. A fluid communication passage interconnects the drive cylinder and the carrier cylinder in fluid communication one with the other, with the fluid communication passage filled with hydraulic fluid. Movement of the drive piston from its start position to its fluid displacement position causes, via the hydraulic fluid, the carrier piston to move from its retracted position to its extended position. Movement of the carrier piston from its extended position to its retracted position causes, via the hydraulic fluid, the drive piston to move from its fluid displacement position to its start position. An actuator is movable between a non-actuating position and an actuating position. Movement of the actuator from its non-actuating position to its actuating position causes the drive piston to move from its start position to its fluid displacement position, thereby causing the carrier piston to move from its retracted position and its extended position to correspondingly move the insert member into the internal cavitation during a molding operation. A biasing mechanism is operable to return the carrier piston to the retracted position.

A hinged closure which is molded from plastic and includes a cap which is fastenable to a neck of a container and which has a casing, a cover plate adjoining the casing, a retaining skirt protruding from the inner side of the cover plate, and a dispensing opening provided on the cover plate; and a hinged lid operatively coupled to the cap by a joint and having a sealing nipple on its inner side, which hinged lid is pivotable by means of the joint between a closure and an open position and snaps into place in both the positions. The hinged lid, the joint, the retaining skirt, and at least a first part of the cover plate are injection-molded from a first plastic. At least the casing is injection-molded from a second plastic, and the first and the second plastics are integrally bonded together at their transition.