A potentially easier way to collect Dragons breath

Collecting Dragons breath during your battle with the Ender dragon is not ideal. It would be much easier if you could take the dragon heads off of the End City ships, hook them up to a lever or some other redstone contraption, and when activated the head will spew out Dragons breath! This would make it possible to collect the resource in a safe and controlled environment. You could also use it for some traps to unleash on your friends! ;)