This is a candle holder created in Structure Synth - a 3D generative art coding app.
On my blog you can read more about how it was made, including the Structure Synth script I wrote to generate it, and how I was able to turn it into a printable object: http://wp.me/p2hTaI-mi
Print and stick a candlestick in it! It's sized for a standard US candlestick (21mm-22mm at the base).
I printed mine on my Formlabs Form 1 printer, without internal supports. I'm not sure if a FDM printer will be able to print without full exterior supports.