Sherlock's Teacup.

From Sherlock and Jim's tea party in The Reichenbach Fall.  I totally love it. It was a birthday pressie from Maggie and part of a range made by Ali Miller - I'm very tempted to save up and buy myself the rest of the set!
Whenever I use it I can hear Moriarty in my head saying "..and honey you should see me in a crown!"  :)