A cap assembly includes an access member including a first section and a second section. The first section includes a connection portion that is attachable to an extraction device that extracts contents of a reservoir. The connection portion includes a first opening. The second section includes a second opening in fluid communication with the contents of the reservoir when the access member is secured to the reservoir. The cap assembly includes a valve member insertable into the access member so as to be in fluid communication with the first opening and the second opening and such that the valve member i) seals the contents of the reservoir at the first opening when the connection portion is not attached the extraction device, and ii) provides access to the contents of the reservoir through the first opening when the connection portion is attached to the extraction device.