| abstract |
A system includes a container and an adapter. The container may include a wall defining a receptacle and a neck, the neck forming an opening and a passage in fluid communication between the receptacle and the opening; a closure assembly having a portion disposed within the neck, and including an insert defining a valve seat, an actuator, a valve member attached to the actuator and sealingly engageable with the valve seat, and a biasing member disposed between the insert and the actuator. The biasing member urges the valve member into sealing engagement with the valve seat in an actuator advanced state, and the valve member disengages from the valve seat in an actuator retracted state, the actuator depending through the opening in the advanced state. The adapter may be removably attached to the container, and configured to move the actuator from advanced to retracted state upon attachment. |