So I created this before I discovered Arafruit already has some neat sew-in diffusers uploaded (http://www.thingiverse.com/thing:225574). But now having built a few of these and have them work out pretty well, I thought I'd post it. Fits Adafruit's Flora NeoPixel module.

Object likely only works on Formlabs type printer. Got some small holes for sewing that I don't think FDM type printers will be able to reproduce. Need pretty fine pitch to reproduce.

Used this for glowing eyes on a costume. Worked a treat.