"Where did you find glass baby bottles?" You may have a hard time finding them as they dont make many glass bottles any more. I know when my baby was born we had a bunch of the glass bottles that came with formula in them from the hospital. I know some people make candles in the baby food jars. As for the wicking, you would probally just go by the diameter of the bottle. Most baby bottles are 2 inches wide(After washing bottles for a year, I know alot about them lol:) ) so probally start with a zinc 44.