This is same idea as others, just my version of it. I wasn't happy with the flimsy plastic cup for the wick part. Used 3" PVC and cut lengths and slits with miter saw. Won't have to worry about colapsing, ever. Also, on the filling pipe, I cut a miter on the end eliminating one cut. Wanted to add the electric pvc conduit is exactly the same except cheaper in price. Both schedule 40 and also they put something in it to protect from uv rays.
luke