I liked the original box a lot, but I wanted something to seat the rings into it. So I created an insert that fits nicely inside the box. It has a 0.15 mm tolerance, you might need a bit of glue on the bottom to make it stay in the box. It also has Mr. and Mrs. debossed text above the holes for the rings.

Printed it in PLA with 3 perimeters and 15% infill in Polyterra Marble White.