Video. Older viewers will remember when lava lamps first brightened up our lives. Back in the 1960s the colourful lamps arrived on the scene and we were fascinated as globules of brightly coloured oil drifted up and down in a glass tube.
Over the years they've been in and out of fashion, but they've stood the test of time. As Martin Dowse explains, the factory where they are made has been marking the 50th anniversary of the lava lamp.
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