Thanks for the confirmation.
So the bottle is the one stowed into the door bustle together with the folded slide/raft. Normally that bottle would stay behind after the raft is disconnected. If it was found still attached to the raft it pretty much means that the whole evacuation device was dislocated upon impact due to structural damage.
It's an assumption, I know, but it's an informed one based on what we see in the photo.