Two analogies that relate items to the associated containers is given in the form "A : B. C : ?". "A : B" relates item A to its associated container B. Your task is to replace the question mark (?) with the appropriate container for the given item C, following the "A : B" relation.

trash : can. poster : ?
tube
To throw trash away, one could put the trash inside a can. Similarly, one could store posters in a tube..