Single use cap

A single use cap for a receptacle, the cap comprising:

• a cap body having a top, a bottom, and a hollow interior therebetween accessible through an opening in the bottom of the cap body;
• a cap base coupled at the bottom of the cap body and comprising an opening therethrough about an axis of rotation of the cap base;
• and
• a threaded component configured to be movably received within the hollow interior, and comprising an opening with inwardly protruding threads concentric with the opening of the cap base, the threads configured to receive threads on a neck of the receptacle;
• wherein the threaded component is configured to rotate with respect to the cap base about the axis of rotation from an unused position, where the threads of the threaded component are reachable by the threads on the neck of the receptacle, to a used position, where the threaded component is freely movable vertically within the cap body such that the threads of the threaded component are not reachable by the threads on the neck of the receptacle when a distal end of said neck contacts the threaded component;
• wherein the threaded component comprises one or more features, each configured to:
• prevent rotation of the threaded component in a direction corresponding to a tightening rotational direction of the threads of the threaded component when the threaded component is in the unused position;
• and
• prevent rotation of the threaded component in either the direction corresponding to a tightening rotational direction of the threads of the threaded component or a loosening rotational direction of the threads of the threaded component when the threaded component is in the used position.