This box allows easy printing and customization since the side panels are flat on the backside and all pieces are printed without support structure. A PDF file shows the dimensions of a blank side panel so you can easily make your own designs for the side panels. The box is held together by latches--not by friction. Both the side panels and the posts use latches. To assemble, insert two posts at a slight angle outward from the center, as shown in one of the photos. Then make them vertical and insert one side panel, pushing it down until it clicks into place. Add another post and repeat.
Similar to another box (3103914) I did, this one instead has panels that will not pull out directly perpendicular from the posts, but must be instead, slid out the end. This makes the box much stronger and eliminates the need for any kind of internal brace. Although strength is not a big issue for a box this small, it becomes important when you try to make the box bigger.
The posts are also held down by latches so there is no tendency for them to lift up when the top is removed. To remove/install the posts tilt them back from the center about 15 degrees as shown in one of the pictures.
I included two decorative panels with features (spikes and a volcano) to indicate the possibilities. If you want to warn people off, you may want to put spikes on all four sides!
MG Chemicals PETG
100% infill on base and top because it hardly affects print time and keeps latches from being hollow. 25% on posts. 20% on handle and side panels.
Tapped the hole in the handle with a #8-32 tap. Fastened to top with a #8-32 x 5/8" flathead screw.
I realized I could greatly increase the strength of the box by putting a bend on the panel edges that went into the posts. Playing around with the geometry for a while in FreeCAD led to this design, which fits the posts in the same envelope as the previous box. Adding a latch to the posts to hold them down, completed the design.