If you\'ve ever needed some motivation to turn lights off when you leave a room then here it is: the stern but kindly face of Optimus Prime to remind you that Energon is too valuable to waste.Our inspired Transformers Conserve Energon Mug Mug is a specially designed piece, only available on our site. Developed for us, this product includes a bold print on a stylish mug.Each and every one of our mugs make thoughtful presents for a range of hot drinks. Represent your unique personality with every use. Made from CeramicMicrowaveableDishwasher FriendlyCan hold 11oz UK Made The generation-spanning Transformers series has grown to a global household name. The war between the Autobots and the Decepticons rages on, as they battle it out for control of their worlds.