A Safer Object Permanence Box

I wasn't satisfied with the object permanence boxes available, so created my own improved version.

Improvements include:
- Sloped floor
- No sharp edges
- No sharp corners
- No supports needed for the box
- STL exports were terribly coarse, no harm in using more elements people!
- This ended up being an igloo instead of a box, but does it matter? Its safe(er)! :D


By my unofficial reckoning, this ball satisfies the non-chocking hazard requirements as listed in 16 C.F.R. § 1501.4 so long as the ball is rigid enough to maintain its shape. Hence, I recommend printing a ball instead of using a 'ping pong ball'
https://www.ecfr.gov/current/title-16/chapter-II/subchapter-C/part-1501/section-1501.4

128g, 9.5h, 0.4mm nozzle

40mm (standard ping pong ball) = 1.57in > 1.25in.


Cheers!