I use this mold, http://www.candlewic.com/store/Product.aspx?q=c29,p208. I have a few of them but there is a larger size I just don't have the room for it in my work area (kitchen). I never have a problem with off center wicks and it only took a couple batches to get the hang of not over pouring. I have no problem selling a dozen for $10.00 and only make scented ones. Even with the mold for the time saving aspect cost of supplies make it impossible to compete with the big bags of plain.