Perfect Change coin Holder

This coin holder will ensure you always have perfect change. It holds $0.99 + a $1 coin as the retaining lid. I am going to start carrying this in my EDC, however I have not field tested it as of yet. It seems like the coins stay in pretty well, but I won't really know until I test it more. If anyone makes one, let me know your experiences.

I printed it at .2mm layer height, with 65% infill.

Update 3/13/17: I uploaded a "V2" version. The original was thinner and prone to fatigue. Th