Parent of the parent?

Root
|—Home
| |------[COLOR=red]Container[/COLOR]
|
|—Movie2
| |------Sub1
| | |------Sub2
| | | |------[COLOR=blue]Button[/COLOR]

How do I refer to the “[COLOR=red]Container[/COLOR]” from the “[COLOR=blue]Button[/COLOR]”? But not through Root though, I don’t want to use “_root.Home.Container”.