Medicine bottles were the early precursors to Chinese snuff bottles and were sometimes used for snuff as well. This choice Paktong set features finely engraved Beauties on the fronts and the names of the medicinal compounds on the reverse. Threaded stoppers with tiny metal spoons. These unusual bottles are discussed in Raymond Li's book "The Medicine-Snuff Bottle Connection, Chinese Miniature Containers: A Dual Role." Intact sets in such fine condition are rare. This one came from an old U.S. collection and may have some age on it. Another view here.