This is an updated version of Emmet's iris box redesign

Print
The entire box is printed as a single part. A layer thickness of 0.2mm is used to maintain the internal clearance required for the magic effect of a seamless print. The internal clearance is very tight, so a very clean print is needed after printing to make it loose. A challenging problem is the placement of the stitches. Unfortunately, most of the stitch placement options in PrusaSlicer will place the stitches

After printing
After printing, there's a series of small labels at the bottom that need to be cut off, and then there are some parts that need to be loosened. This great video by Anna Kastlunger will show you everything you need to do: