From the article: "A cup believed to have been used by Classical Greek statesman Pericles has been found in a pauper's grave in north Athens, according to local reports ..." (Wednesday, Jul 30, 2014)
If you don't remember Pericles, he was Athens's most famous statesman and orator during the Classical age, before the Peloponnesian War ruined everything.
Judging by the article, it sounds like the cup wasn't exactly his, so much as a cup he and his brothers and a friend used at a party, signed, and gave away. The fact that it was found in a pauper's grave indicates that the person who received the cup likely treasured it for the rest of their life.
That's quite the find.