This is my design of a eraser or rubber protector. Used to keep a regular size eraser clean in a dirty pencil case. Use a high infill density because it makes the container sturdy. Updates are coming. Let me know if you recommend anything.

Edit. Made the container fit better. Made to fit a eraser that is 11.5mm x 22.5mm x 61mm
Changed file so please download again. This one is a better fit

Key Words for searching. Eraser Protector Case Cover Container Rubber Stationary School Clean Simple