The heat-reactive surface reveals the northern lights 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.

.: One size: 11oz (0.33 l)

.: Ceramic material with black exterior and white interior

.: Heat-reactive design

.: C-shaped handle

.: Glossy finish