In-Out Mailbx

I wanted to create a little in-out mailbox for the office. I built it in TinkerCAD. Wanting it to print fairly quickly, I designed each section to be 1 mm thick, but gave it a 5mm thick base to help keep it sturdy and less likely to fall over when you actually add envelopes to it.

A word of caution: I was in a hurry when I printed this model and printed it with 20% infill, which resulted in a bit of a funny wave pattern on the outer shelf. I'd recommend printing it at 0% infill with a thicker perimeter, or 100% infill.