One website has dedicated itself to the half baked idea and thousands of would be boffins have submitted their flights of fancy with no basis in reality.

Spray on Stubble is available in a variety of tones to match any complexion, it’s sharp edged silica, together with a light binder which adheres to your cheeks. You could be cool as a cucumber, proudly sporting a softly droning heli hat complete with counter-rotating fans which would hover a few inches over your scalp.

For the home, there’s a heat seeking ashtray – a walking tripod that scuttles towards your fag ash. And, finally the idea for half baked idea for cake in a can would be better off not being cooked at all.