Lot 358. A rhinoceros horn 'Squirrel and Grapevine' libation cup, Qing dynasty, 18th century. Length 6 5/8  in., 16.8 cm. Estimate 30,000 - 50,000 USD. Lot sold 52,500 USD. © Sotheby's

the reddish-brown horn carved as overlapping leaves, the exterior with a continuous scene of squirrels clambering over leafy fruiting grapevine, the gnarled vines forming the base and trailing into the interior. 

Sotheby's. Fine Chinese Ceramics & Works of Art. New York, 19 march 2013