Bottle closure

A closure for a bottle comprising

• a generally cylindrical inner member having a central bore therethrough and inner and outer surfaces,
• said central bore being adapted to receive and be secured to the neck of the bottle, said neck having a thread structure therein, said inner surface of the inner member being threaded to threadably engage the neck of the bottle, wherein said inner member further includes means for engaging the top portion of the neck of the bottle to form a seal therebetween;
• an outer member having a central opening therein adapted to receive the inner member, said outer member being rotatably mounted on said inner member;
• said inner member including a valve seat defining a fluid passage between the container and the outer member and being positioned to be located within the opening of the container and
• said outer member including a valve closure element adapted to close said fluid passage in a first angular position of the outer member on the inner member to form a seal with the valve seat and
• to open said fluid passage when said outer member is rotated to a second angular position relative to said inner member thereby to allow fluid in the container to flow through the closure;
• said outer member having an inner surface defining said central opening and an outer surface:
• the inner surface of the outer member and the outer surface of the inner member including cooperating means for rotatably securing the outer member to the inner member for rotational movement between said first and second angular positions;
• and
• said inner member and said outer member further including cooperating means for forming a seal between the outer surface of the inner member and an inner surface of the outer member.