The Apache was a combination dagger, pepperbox, and knuckle duster manufactured and sold in the United States from 1870 through 1900. More pictures and history of this unique pocket weapon at the link.
http://www.hellinahandbasket.net/2009/04/is-that-an-apache-in-your-pock-1.htm
I only hope that they made the porcelein strong enough... :-P
http://www.thabto.co.uk/mug.htm
My dad's getting one for fathers day