Invented by Edward Craven Walker, this novelty lighting instrument featured a glass bottle full of wax and oil with a coil in the metal base. When the lamp was turned on, the coil would heat up and globs of wax would bubble around in the oil, producing a "lava" effect. Some claimed the lava lamp was meant to simulate the hallucinogenic visuals from the drugs that were becoming so popular.
Helen Davies, Marjorie Dorfman, Mary Fons, Deborah Hawkins, Martin Hintz, Linnea Lundgren, David Priess, Julia Clark Robinson, Paul Seaburn, Heidi Stevens, and Steve Theunissen
Guinness World Records is known for compiling thousands of records set by others. But does it hold any records of its own? HowStuffWorks finds out.