How do Dragons Breathe Fire?

The Dragon has two small lumps of tissue in the back of its throat, inside a crevice, between these two lumps there is a small jolt of electricity that passes across them constantly. This occurs because there is a large amount of special nerves within the lumps, and they send messages across to each other causing electric jolts to span the gap. So when the gases are passed through the mouth, the electricity ignites them and they create a jet of flame. Over the crevice there is a large thick membrane that can be controlled consciously by the Dragon. This membrane can open or close over the lumps of tissue so that the Dragon can breathe through its mouth without having to breathe fire. Inside the dragons mouth there are several glands which excrete a extremely strong, non-heat conducting mucus. This mucus lines the inside of the Dragons mouth so the Dragon does not burn itself when it breathes fire. Contrary to some Draconologists, Dragons cannot breathe fire through their noses. And also, contrary to a lot of standard Dragon stories, they do not expel any smoke. To do this they would have to burn something like wood or coal, where all of the material can not be burnt, and are passed out as gases.

In the world of fantasy, dragons do exist.  Your charming little snuffer ashtray will delight you as it serves you well.  It is made of a ceramic bisque and measures approximately 5".   It will arrive at your doorstep in the flash of an dragon's eye.