A Site which hosts this Container.
“Hosting”, in this case, has a dual meaning :—
The Site which hosts a Container must make the Container accessible as part of the same network thru which one accesses the Site itself: The Site must be a technological host or access point for the Container.
The Site which hosts a Container must logically include the Container: The Container must comprise a logical part of the Site.
This property is not functional (or inverse functional); multiple Sites may host a Container, and multiple Containers may be hosted by a Site.