Large Harry Potter Colour Changing Potion Lamp - Cast a spell on any Potterhead with the Harry Potter Colour Changing Potion Lamp. Shaped like a potion bottle, with a cork stopper and label, the lamp features a milky liquid-like solid which changes colour throughout the time it is switched on. The lamp will add a magical ambience and will help keep Death eaters at bay, especially during the night when shadows stretch and loom across walls. It is only to be used by the most prolific of wizards and witches as the Polyjuice Potion allows them to take on the form of somebody else; this comes with consequences when used incorrectly. Magical and mesmerising. Official Harry Potter merchandise. Changes colour of potion liquid throughout time it is switched on. Potion liquid is solid. Features Polyjuice Potion label. Requires 3 x AAA batteries (not included). Made of plastic. Measures 20 x 9 x 9 cm. Weighs 250 g. 1 x Large Harry Potter Colour Changing Potion Lamp.