Just a simple box generator. Save on material by avoiding solid walls. I also have a round version.
Sometimes you need a box to transport other, more delicate things you print. There are a number of box customizers on Thingiverse, but most of then generate boxes with solid walls, which consume a lot of filament. Use this to make a box with lattice sides and save yourself some money.
If you use OpenSCAD, you may find the lattice functions useful in your own designs.
I recommended using 100% infill for strength. Use the "density" setting in the customizer to control the amount of material required.
Supports are not required if the lattice angle is 45 degrees. If you set the lattice angle to 0 degrees, the model may print more quickly. It should still be printable without support on most printers as long as you keep the lattice spacing to 5mm or less.
You don't need a raft, since the bottom is flat. You can select a solid top/bottom in the customizer.