Isnt this just a siphon so why shouldnt I just use a cheap hose to siphon gas?
No, Ez-FUEL bears no resemblance to a siphon system. Siphon systems are extremely dangerous, gasoline is toxic, and siphons only work if the receiving container is below the siphoned tank and then you would still need to pour the container into the tank of the item you want to fill in the first place. In the past ten years most vehicles have a fuel tank filler tubes that have baffles built into them which make it impossible to get a siphon tube in anyway.