Just spotted this by way of NYC Resistor.
This is a Voronoi box. The pattern is a Voronoi tessellation. I've seen these beautiful patterns before but never known what to google. This box was made by Trammell Hudson of Resistor who has kindly shared a couple of scripts to generate the patterns on his bitbucket as well as another to generate some cool circles.
Check out the original post for all of the the beautiful details. I'm about to fire up the laser and add some LEDs...