Item from harry-potter-half-blood-prince by
A Horcrux — a small golden cup that once belonged to Helga Hufflepuff, stolen by Voldemort from Hepzibah Smith.
Harry sees in Dumbledore's Pensieve memories how young Tom Riddle murdered Hepzibah Smith and stole both the cup and the locket. The cup is a confirmed Horcrux but its current location is unknown.
A small golden cup with two finely wrought handles and a badger engraved on the side.
Also known as: the cup, Hufflepuff's cup