Horn Drinking Vessel - Unknown Origin - Circa 1950's - Unusual!

Description

Cow Horn Drinking Vessel
I am not positive about this piece nor its use. I had been told it was possibly for black gun powder storage and then was advised it is a drinking vessel. I concur on the drinking vessel. It measures approxiamtely 14 1/2".
All I do know is that it definitely has age and was purchased at an antique shop in the early1950's.
I am not cerrtain what animal is on the lid - it opens and closes tight. I believe it is white metal and brass.
As to condition, there are scratches as shown on my last picture and there is also what might be a round repair that has some type of filler. I don't know if this was original to the piece.  It has not been cleaned.
Thank you for your interest!