To be frankly I would remove "Container" from all menues. 

It is redundant information that doesn't help to describe "collection" any better. If you want to be precise, "Resource Colllection", would be the way to go, but I wouldn't go that far. 

In the end I'm not a native speaker, so I might miss something important.

FYI: I would understand if "container" was added to articles, because the word "articles" alone is not sufficient to describe the function of the resource type. In the end I'd rather have "Blog" and "Post" than "Articles" and "Article", but this is another story.

Regards,

pepebe