I chose walnut hardwood and finished it with a little mineral oil. This file should work with most 1/2" thick materials.
"For the interlocking votive acrylic top, see this Easel project":http://easel.inventables.com/projects/u10xDv-O3OeU4Wi1fPI05w Or design your own!
"For the base design without the interlock (for different material thicknesses), see this Easel project":http://easel.inventables.com/projects/t1DtsEmOfksTfSFyA6116g And "check out this Easel Live episode on making interlocking candle holders":https://www.youtube.com/watch?v=TXDfXJQOtFg to learn how to use the Interlocker app in Easel.
Yield: you should be able to make at least 3 candle holders from one 6x12 piece of material.
Estimated time: 15 minutes