Cash Wallet

Hi everyone,
This is my first model that I've created and I would love to get some feedback. I'm trying to gain more knowledge with modeling programs and started this out with TinkerCAD as it's probably one of the easiest programs to use.
I wanted to make this cash wallet to be able to put any loose cash I had in my backpack into it so that it would remain in an enclosure instead of moving around freely in my backpack. It has a fairly tight tolerance so it does require some force to close and open, which I prefer so that the box doesn't open while in my backpack.
I do plan on making adjustments if needed in the future but for now it works well and once I get some time and use out of it I will see what wears first and what may need to be improved.
I used BambuLab PLA matte and plan on making a PETG version once I start printing with that.
As of now I have 13 bills inside and they fit with no issue, I think it will hold up to 20 bills folded in half without issue but I will try that out soon and verify.

Design by davetrooper on MakerWorld (license: BY).