A lava lamp (or Astro lamp) is a decorative novelty item that contains blobs of coloured wax inside a glass vessel filled with clear liquid; the wax rises and falls as its density changes due to heating from an incandescent light bulb underneath the vessel. The appearance of the wax is suggestive of pāhoehoe lava, hence the name. The lamps were designed in a variety of styles and colours.
Other articles related to "lavalamp":
... Homebrew lava lamp recipes can be found over internet, however some of them rely on combinations of highly flammable components like alcohol ... Such lamps could represent a serious fire hazard in the case of rupture when heated over a light bulb ...