Lava Lite 5002 16.3-Inch Heritage Collection Century Lava Lamp with Silver Base, Purple Wax/Clear Liquid Classic, iconic shaped lava lamp with glass globe for home, dorm room, or office. Soothing, slow-moving bubbles. Glass housing with steel base and matching cap. Electrical cord with inline switch for plug-in operation; 40-watt incandescent bulb included. Trouble-shooting tips can also be found on website - http://www.lavalamp.com/UseCareGuides. 90-day limited warranty. For any further queries please contact Lava Lite Customer Service at (800) 336-5282 weekdays 8-5 CST or info@lavalite.com.