The first and original lava lamp designed by the founder of Mathmos and inventor of lava lamps; Edward Craven Walker in 1963. Made in Britain for over 55 years; the base and cap are hand spun and polished by British craftsmen who bring the top quality spun aluminium to a high silver shine. Mathmos' unique lava lamp formula has brighter, clearer liquids and lasts longer than other lava lamps. The halogen bulb, included and guaranteed for 1 year, is made specifically for use with Mathmos lava lamps to direct light and heat into the lava and away from the base. Warm-up time is between 1 and 3 hours, depending on the surrounding temperature.