Smaller Cargo ship
This low profile and slow way is good for getting the container around. Since the Blight and the demise of the U.S as a world power it has rotted internally. The sea has become a reliable and cheap way to bring goods around. Getting the container from the main cargo ship will be difficult at high sea. Once on board a wide variety of locations will be available. If it lands in port the documents will need to look convincing.