We got other Rupert Spira goodies whilst out yesterday, a couple of espresso cups:
They have a black slightly metallic glaze which, when the light is right, burns with iridescence. I will feel much happier when I make a brilliant espresso into one of these.
Just so you know, if you are looking to pick up some Rupert Spira stuff this is the mark on the base you should be looking for:
That red glaze is amazing.