A 2in1 storage box + tray.
Designed to fit the ships from the Seafarers expansion.
I made 4 changes on the original design:
1- Made the model taller (around 37.5mm). This means that you could still fit 2 on top of each other in a Catan box.
2- This had another advantage of making the holes inside the lid deeper, which meant that the pieces are held more securely.
3- I closed the u-shaped hole at the front of the model to prevent small pieces (esp. roads) from falling out when storing in the Catan box.
4- I made the holes in the lid a bit tighter so that the pieces would sit in them without too much wiggle. It still won't be perfect because I discovered that the road pieces don't all have the same thickness.