Rotary Drill Bit Holder

My son made this at my request. It is designed to perfectly fit one of the drill bit sets that can be purchased at Harbor Freight:
https://www.harborfreight.com/brad-point-wood-drill-bit-set-7-pc-61640.html
The design collects the bits (which don't come with a case) in appropriately-sized cavities and keeps them in place with a rotary cap. No supports are necessary, but high infill and at least three shells/perimeters are recommended.