where is the container?

Thinking of the human body as a container and containted is quite fun and interesting. from skin containing my body down to the mitochondria in a cell containing energy for that cell, the body both contains and is contained on a multitude of different levels, especially interesting when thinking about the body, or the body of a sheep, is that it all happens concurrently. Again further exploring is the act of ones body creating containers and things contained, such as Goldsworthy containing twigs in the air. How long are things contained? Goldsworthy projects are often short-lived, if lived in his ideal at all. As I breathe, I contain air, but I exhale that air as well. A short-lived container. Once it is exhaled it is contained by something else, but do I ever re-contain the exact same air? I suppose I must. The transient nature of contain. Where is the container? everywhere all at once. Everything can contain. I think, maybe not pure energy, what does it contain? Perhaps on extreme microscopic scales things do not contain but are only contained. Oppositely, are things extremely large, say the whole universe, not contained and only containers?