ContainerView seems to have a number of practical limitations when it comes to playing with render helpers, as the automatic-wiring that occurs is less than the render helpers expect. e.g. there is a rendering error when the view has a template that uses a handlebars helper.
Rather than retype everything, here is the SO question I posted a few moments ago:
Code example: http://jsfiddle.net/AshCoolman/KyJ2U/6/embedded/result/