Abstract: An expandable container system including a container, an expandable nipple and a one-way valve. The expandable nipple is attached to the first end of the container and the valve is attached to a second end of the container. A counteracting bias force is generated within the container and a first fluid is drawn in through the valve by extending the expandable nipple. When the expandable nipple is released, the expandable nipple is biased back to an unextended state, and an increase in pressure created by the counteracting bias force induces a second fluid to flow out of an outlet in the expandable nipple.

Abstract: A gate assembly is provided including frame means for positioning in an opening through which selective entry is required. Barrier means are mountable on the frame means via hinge means and the barrier means are movable relative to the frame means between a closed position, wherein the opening is closed, to an open position, wherein the opening is open. An automatic closure mechanism is provided for moving the barrier means from the open position to the closed position without user intervention. The automatic closure mechanism is associated with the hinge means and includes at least one ramp or inclined surface on which at least part of the gate travels when moving between the open and closed positions.