A rather fun black mug with a white "Rocky Horror Show" logo and the phrase "I see you shiver with antici" followed by a rather subtle "pation" is dark red lettering. It took me a while (and a good light) to spot the red writing. Inside of the mug is plain white.

And that is where it got fun. I mentioned to Stephanie that the writing was hard to see and she said; "What happens when you put hot water in?"

The short answer is "Wow!". Not only does the "Pation" writing appear as a bright red shade, but the mug itself changes colour to white (except the bit where the handle doesn't get hot). I love it. What a great idea.

    Heat up the mug to see the writing and change it's colour.

I collect Rocky mugs, so this is a great one for me as it is unusual.

Not currently available online (as of Thursday, December 24th, 2015), buy them at the show £10 as of Thursday, December 24th, 2015.

3¹/₂" / 9cm high, 3" / 7.5cm wide

We also have an interactive 360 degree version of the mug, shown below, so you can have a good look around the whole item.