Opus Antiques has dated this piece to the 19th Century.
There is a bone peg being used for a stopper. This piece is very finely made and is in very good condition.

It measures approx 7cm l x 3.5cm w.
A bugbear was a folkloric creature, and the term became a playful label for grotesque or humorous carved figures. In treenware, bugbear flasks were usually:
Carved from coquilla nut or boxwood or other fine-grain hardwoods.
Depicting a grotesque or humorous face on one end
Hollowed inside and used to carry snuff (powdered tobacco).
Often detailed with elaborate carvings like soldiers, animals, or floral designs
Opus Antiques has dated this piece to the 19th Century.
Antique treen, boxes & decorative georgian items
You can view the stock and full dealer information on the Opus Antiques Profile Page