Great post, Max.
I'm still a bit fuzzy about a few things. Say, for example, I am reading a book, then my attention is drawn towards the TV. Does the book vanish from the container because my awareness is no longer on it? If I am partly aware of the book and the TV at the same time, are they both still in the container? Also, what about half-formed ideas, impressions, memories, vague feelings, which come and go, of which I am only partially aware - do they just drift in and out of the container?