This is a protective case for the  USB-C Logitech Crayon Apple-Pencil alternative.

It's designed to be opened and closed by screwing the two parts together.

From personal experience i can tell that if you are printing this on a bed slinger printer i recommend printing slower or with less acceleration since the bottom part could come of the print bed if moved/shaked to quickly/heavily . Also, a brim might be helpful. 

If you have any recomendations or improvements, feel free to post them in the comments.