1. The Mathmos was the name of an organism formed of all the negative energy of the citizens of * City, which was the setting for cult 60's movie 'Barbarella' (Jane Fonda) - based on a comic strip of the same name.
2. Mathmos is also the name of a company that created the original Lava Lamps, a psychedelic concoction involving a glass cylinder containing swirling, coloured wax, which looked a lot like the Mathmos itself.
See also: Matmos, Barbarella, Duran Duran, Jane Fonda