Yes, the holes of small diameter (such difficult for execution!) there are totally unnecessary for the inkwell.
May be anyone know about this artifact more?
The black and red ink was used by the ancient Egyptian scribes. But five bubbles ink «in the one body» (as we can see on the first photo on the right) is already too.
Оn the surface of the right inkwell there is a vertical groove. Obviously, it was served to slide by guide rail. For the «ink bottle» they are redundant.
The presence of chamfers also suggests that we observe a very high-tech works made by an industrial way.