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Mathmos Fireflow Tea-light Lava Lamp is a twist on the classic lava lamp design.
It still has the iconic rocket shape, but rather than being powered by mains or battery, the lava is heated up by a simple little tea-light. It takes about 20 minutes for the lava to warm up and get moving, but one tea-light is enough to power the lamp for 3 hours. The lamp is available with a choice of blue, pink or turquoise lava in clear liquid and costs just under £30.
Buy it online from Gadgets.co.uk.