www.hippielight.com: The History of the "lava lamp" | The Hippiest Light of the "lava lamp". Informative Website Regarding Vintage 1960s & 1970s "lava Lamps", Grape Lamps and Johnson Industries Rain Lamps
MATHMOS Astro Classic Retro 60s Mod Lava Lamp in Blue/Green
Bump Rechargeable Lamp - Mathmos - Touch of Modern