19th Century Whaler Made Turned Ebony Stemmed Cup

19th century whaler made carved and turned ebony stemmed cup. “Manila P.I.” painted on one side. Manila, Philippine Islands would have been a port of call on a long whaling voyage.
Likely made by the ships cooper, It makes a great shot glass, perhaps a fancy way to drink ones dram of rum onboard.
3.9 inches high 1.9 diameter.