Abstract: A rotatable cap and modified container neck. Depending from a top panel of the cap is an annular exterior wall and a smaller concentrically positioned interior wall with a space between the two walls sized to receive an upper and thinned portion of the container neck with a tight fit providing a fluid seal. The interior wall of the cap contains a dispensing notch which is aligned straight across with a dispensing opening through the exterior wall. With rotation, the cap raises and lowers on threads relative to the container. When the cap is lowered, the container neck blocks the dispensing canal between the notch in the interior wall and the dispensing opening in the exterior wall of the cap. The top rim of the container neck abuts the interior cap ceiling between the two walls to form a seal. When the cap is raised, the container neck is in part below the notch in the interior wall and the dispensing opening, and thus the dispensing canal is open.

Abstract: A twist open, twist close outer plastic cap with a modified container neck having multiple annular fluid seals and a dispensing aperture located on an outer annular beveled corner of the cap. The twist open/close closure involves raising and lowering the cap on cooperatively structured threads on the neck of the container and interior of the outer plastic cap. Two different consistencies of plastic material are used to structure the outer cap to provide a relatively rigid outer cap structure having a relatively soft interior surface for improved sealing against the neck of the container. A first stop block is located on the lower exterior of the container neck, and a second stop block aligned for abutment with the first block is located on the lower interior of the cap to limit rotation of the outer cap.

Abstract: A twist open, twist close bottle closure is provided in a plastic cap with a modified plastic bottle neck. Depending from an interior top surface of the cap is an annular exterior wall and a concentrically positioned annular interior wall forming a chamber between the two walls sized to receive the bottle neck. The interior upper surface of the chamber is affixed with three annular seal rings adapted to mesh with grooves in the top edge of the bottle neck. A larger central annular seal ring extends downward forming a tongue designed to be pressed into the larger central groove of the bottle neck. This tongue and groove connection forms a tight fluid seal while still allowing rotational movement. Dispensing apertures in the cap and a notch in the upper edge of the bottle neck are positioned to be aligned by rotation of the cap to form an open dispensing canal.

Abstract: The invention provides a twist open/close outer cap internally threaded to fit the threads on a special bottle neck in cooperative sealing attachment with an inner cap inserted into the bottle neck. Structural features and a stop provide bi-directional controlled rotation of the outer cap. A beveled top fluid release plug fitting a correspondingly beveled dispensing aperture and interacting insert structure provides excellent sealing characteristics. The outer cap is a short cylindrical member with an opened bottom and a shallow concave top surface. A flow directing inverted funnel-like protrusion is formed around a dispensing aperture in the center of the outer cap top. Depending from the underside of the outer cap top surface, is a cylindrical sleeve fitting a receiving chamber formed by two base attached walls in the second cap inserted into the neck of the bottle.