DARPA

The Disposable flamethrower is a highly advanced technological device for launching an excitingly-complex chemical reaction physicists like to call "nuclear fission". It can occasionally also launch fire, usually when it runs out of uranium. The disposable version of this device has the added advantage of being quite cheap and coming with free development for the film.

The disposable flamethrower was actually wielded by Bill Gates through the entirety of his career, allowing him to become the world's ultimate leader through his superweapon. When Gates was finally defeated by the alliance of the penguins, he sent a disposable flamethrower back through time to kill himself.

The flamethrower was luckily destroyed by Gates using a conveniently placed factory, and he used the remains to design a new invention, known as the "disposable flamethrower"