I tried a few of the other designs I came across here but each had something I didn't like so I decided to make my own. They're very simple and relatively small at just 100mm/~4". I don't usually need to sort more than $30-40 in coins at a time so I don't need a larger, more efficient setup. They stack well together without slipping down inside the next tray as one of the other designs I tried did. I made the walls 2mm thick to keep them very robust. The thicker bottoms also made it possible to add more holes per tray without sacrificing stregth.

I printed 2 sets. One at .16mm layer height and one at .3mm. Both turned out great and there's really no benefit to the higher resolution on this project. Print time is about 2 hours for each tray at .3mm and 45mm/sec. The dimes tray takes a bit longer with it's lack of holes and therefore more material to print. At .16mm the whole set took a little over 18 hours.

When using the trays, don't add too many coins all at once. I found the best bet is to gently shake/rock the stack back and forth while dropping the coins in 10-15 at a time. You'll have to empty the quarters tray very frequently as the quarters will eventually fill the bottom of the tray and block all of the holes. The pennies tray fills quickly as well just due to the ratio of pennies to other coins that end up in my coin bank (and most anyone elses).