This is a collar stay organizer that was designed in TinkerCAD. I printed it with 5% in fill and it came out great.
I made this design in TinkerCAD. You can ungroup the model in TickerCAD to add more slots to the design or alter it in some other way.
This printed in just over 5 hours on my MakerBot Replicator+. It used about 64 grams of material.