Invisible storage
Storage that adds no visible object to a room — inside the bench, under the bed, in the wall. The top of the storage hierarchy (invisible > integrated > applied), because it holds things without consuming visual space, so a room stays calm and feels larger even while holding more.
Holds more, shows less
A wall of plastic boxes stores things and shrinks the room; a storage wall stores the same and disappears. Invisible and integrated storage reinforce the Extend lever — the less your storage shows, the larger your cleared room keeps feeling.