Remember that time Rose, as Bad Wolf, opened up the heart of the TARDIS, and the golden steam stuff flowed everywhere and she destroyed the Dalek fleet, and then the Doctor regenerated and became a funny Scottish guy for a couple of seasons? Using this mug is kind of like that. Only, without Rose. Or the Doctor. Or the Daleks. (But we have a mug for that, too!) And steam doesn’t usually glow in the dark. But all of the rest of it? Totally almost like using this giant TARDIS styled mug, especially if you put some hot tea or coffee in it and then take it somewhere cold so you can see the steam pouring out of it.