A fluid transfer system includes a container having a body having a sidewall extending between an open top end and a bottom end along a central axis to define an interior cavity, and at least one protrusion extending from an interior portion of the sidewall into the interior cavity. The system further including a connector configured for receipt within the interior cavity. The connector having a body having a distal end, a proximal end, and a sidewall extending between the distal end and the proximal end and defining a fluid passageway therethrough, and a locking arrangement provided on at least a portion of an inner member of the connector and accessible through at least a portion of an outer member of the connector. The locking arrangement is configured for cooperating with the at least one protrusion to prevent rotation of the inner member relative to the outer member.