This is a model designed to solve a personal problem; I have four Pentel mechanical pencils ranging from 0.3 to 0.9 mm, and I needed to store them in an organized way. The design was partly created in TinkerCAD and with the help of the custom box design website bento.io. The result is a functional and robust pencil case. Printed in PLA, with a 0.4 mm nozzle, 0.2 mm layer height, and 0.4 mm line width.