I have a jiggler hose, and you still need the Jerry can to be higher than the fill point.
FWIW I bought a Tanami Pump, marketing line: Quote You will never lift a Jerry can again! Unquote
Jiggler used once by necessity, never to be used again.
Tanami Pump, used so far 7 times, I would never go back to a jiggler.
With the Tanami pump you do need an air pressure source, but as you only need a couple of PSI for it to operate effectively, a cheap bike pump will suffice.