How about this...a black mug that turns to a colurful 'streaks' mug? Colourful and lava like. Good way to start the day. The heat-reactive surface reveals the colours once the mug gets warm. The ceramic cup will go back to its original black outside and white inside when it cools down. The C-shaped handle helps keep a sturdy grip. It comes in one size – 11oz (0.33l) – plenty for that big morning cup of coffee. Packing and postage included in price. Hand washing recommended.