I tried it but it doesn't seem to work. I clicked a new "Work" container, then went to mail.google.com, and it instantly took me out of the container.

And then when I click back to the work container and try to access mail.google.com I get:

"400. That’s an error.

The server cannot process the request because it is malformed. It should not be retried. That’s all we know."

Bug? It seems like a really messy UI. Why can't they make Multi-Account Containers work just like Facebook Container? Or have make 1 window == 1 container?