And no, this is nothing to do with what happens if you take a bath too soon after scoffing all the sprouts during Christmas lunch. Tsk. Instead, this Underwater Volcano is a lamp being sold by The Doghouse, and is like a next-generation lava lamp.
Its core changes colour when switched on, while firing out red-hot magma balls, along with a "rhythmic swishing sound". Hang on, I’m not so sure I want my swanky lamps to make a sound. Still, if you don’t mind this lamp’s attention-grabbing antics, it’s mains-powered and costs £29.99. They’re probably selling faster than hot geological rock cakes! BUY IT