Ship's container (6)
I believe the answer is:
vessel
I believe this is a double definition.
'ship's' is the first definition.
(thesaurus)
'container' is the second definition.
(vessel is a kind of container)
(Other definitions for vessel that I've seen before include "Large boat; container" , "Ship, or artery" , "bowl?" , "Watercraft or water container" , "one swimming in blood?" .)