A container assembly for holding a medication for delivery to a patient using a delivery device comprising a socket, a post and a fluid passageway, the container assembly comprising: a container configured to hold the medication; and a port connector for co-operating with the delivery device, wherein the port connector is coupled to the container; the port connector having a delivery port with an inlet and an outlet, wherein the outlet of the delivery port is defined by a wall of the port connector; characterized in that: the delivery port includes a shoulder, a pin, a first seal and a second seal, wherein the wall is moveable relative to the pin and into the socket of the delivery device, the shoulder is configured to transfer movement of the port connector to the first seal, and the first seal is movable relative to the pin and towards the post of the delivery device, to move the port connector from a sealed configuration to an intermediate configuration and to a delivery configuration; wherein in the sealed configuration the first and second seals (154, 156) are positioned in sealed engagement with the pin to close the delivery port; in the intermediate configuration the first seal is positioned in sealed engagement with the delivery device and the second seal is positioned in sealed engagement with the pin, wherein the delivery port of the port connector forms a sealed connection with the delivery device, while the second seal in sealed engagement with the pin blocks fluid flow from the inlet through the delivery port; and in the delivery configuration the first seal is positioned in sealed engagement with the delivery device and the delivery port is positioned in fluid communication with the fluid passageway of the delivery device. a container configured to hold the medication; and a port connector for co-operating with the delivery device, wherein the port connector is coupled to the container; the port connector having a delivery port with an inlet and an outlet, wherein the outlet of the delivery port is defined by a wall of the port connector; characterized in that: the delivery port includes a shoulder, a pin, a first seal and a second seal, wherein the wall is moveable relative to the pin and into the socket of the delivery device, the shoulder is configured to transfer movement of the port connector to the first seal, and the first seal is movable relative to the pin and towards the post of the delivery device, to move the port connector from a sealed configuration to an intermediate configuration and to a delivery configuration; wherein in the sealed configuration the first and second seals (154, 156) are positioned in sealed engagement with the pin to close the delivery port; in the intermediate configuration the first seal is positioned in sealed engagement with the delivery device and the second seal is positioned in sealed engagement with the pin, wherein the delivery port of the port connector forms a sealed connection with the delivery device, while the second seal in sealed engagement with the pin blocks fluid flow from the inlet through the delivery port; and in the delivery configuration the first seal is positioned in sealed engagement with the delivery device and the delivery port is positioned in fluid communication with the fluid passageway of the delivery device. the delivery port includes a shoulder, a pin, a first seal and a second seal, wherein the wall is moveable relative to the pin and into the socket of the delivery device, the shoulder is configured to transfer movement of the port connector to the first seal, and the first seal is movable relative to the pin and towards the post of the delivery device, to move the port connector from a sealed configuration to an intermediate configuration and to a delivery configuration; wherein in the sealed configuration the first and second seals (154, 156) are positioned in sealed engagement with the pin to close the delivery port; in the intermediate configuration the first seal is positioned in sealed engagement with the delivery device and the second seal is positioned in sealed engagement with the pin, wherein the delivery port of the port connector forms a sealed connection with the delivery device, while the second seal in sealed engagement with the pin blocks fluid flow from the inlet through the delivery port; and in the delivery configuration the first seal is positioned in sealed engagement with the delivery device and the delivery port is positioned in fluid communication with the fluid passageway of the delivery device.