sentences:  The vessel is usually sent for Sam to open in a wooden box which varies in shape per episode, sometimes inappropriate for the vessel they hold (i.e.a large box contained a Zippo lighter vessel) and it's usually up to Sam to figure out how to use it to capture the escaped soul assigned for him to apprehend since the vessels don't usually come with an instruction manual.All vessels are unique because each of them is intended to capture the escaped soul for whom they were created and intended to confine.