The northern lights are revealed when this cup is filled with a hot beverage

My favorite geeked out storefront ThinkGeek is bringing the aurora borealis to your breakfast table in the form of a 12oz, thermal-sensitive, mug.

Simply fill the black mug with your favorite hot beverage and the northern lights appear right in front of your very eyes.

“Caffeine. It makes us light up. It excites us. The thought of that first cup of coffee can really get us moving in the morning, literally and figuratively,” explains Think Geek.

“Much as caffeine particles pass into our bloodstream and make us bounce off walls, so, too, the particles from solar winds pass through the Earth’s magnetosphere near the poles and share energy, causing a spectacular display in the upper atmosphere. When these particles collide with oxygen in particular at lower altitudes (up to 150 miles), the photon released appears green or yellow, giving a similar light show as to the one captured on this mug when you fill it with warm liquid.”

Here’s the cup in action:

aurora borealis heat-changing coffee mug

You can pick up your very own mug at ThinkGeek.