Heavy duty bulletproof low-poly stealth dental box

Update 2020-10:
Bigger version (all new design) here:
https://www.thingiverse.com/thing:4623986

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This is what evolution led me to. My son just broke the first box, which I designed to replace the original one. Now the newest version should perform better, super sturdy, rugged, whith improved, reinforced hinges. And, of course, had to look cool, too...

So I came to the actual F117-inspired design. 3mm walls, just big enough to fit his braces. Check the PDF to see if it a