Box with lid.

thingiverse

To practice creating a geometric object, use a simple box with a lid. Utilize Cura 13.03's default settings under Basic Quality and set Layer Height to 0.1mm, Wall thickness to 0.8mm, and enable retraction. For filling, choose Basic Fill Density at 25%, and disable Support structure or opt for "Exterior Only." In Expert Config-Infill, select Infill pattern as Hexagonal Grid with a 50% overlap.