A fluid transference system, including: (a) at least two inflatable objects; (b) at least one variable-state fluid transfer conduit, interposed between a first and a second inflatable objects, the variable state conduit configured to allow fluid flow there-through in an open state and to disallow the flow in a closed state. A fluid transfer system, including: (a) an entry port; (b) an exit port; (c) a unidirectional main conduit defined between the entry port and the exit port; (d) an intermediate port; and (e) an intermediate conduit defined between the intermediate port and the main conduit, intersecting the main conduit between a first unidirectional valve and a second unidirectional valve, the main conduit defining a unidirectional fluid flow.