Unfortunately, when asking to T-Net Members to ID an item, its best not to name the suggested categories...
Doing so, presupposes what it could be and leaves openings for arguements between the poster and those reviewing the posted item...
In fact, it could easily be an oriental import and have nothing to do with being a Native American relic...
Need pics of outside perimeter, bottom and inside....need to see tool carving evidence more clearly...
Also need dimensions such as height, width, capacity (8 oz, etc)
Weight and water displacement may point to wood options...
Worm holes?
Micro pics of grain...open, closed, etc