Sorry, I should have clarified that I am double wicking these containers. The package reads 2-3" for CD7s. I came to the conclusion that the CD8s are just too big. I am going to try the CD6s and see how they do. The containers are round, i.e., 3-1/2" mouth, 4-1/2 middle and 2-3/4 bottom. I mainly do pillars and not a whole lot of containers. So I am still learning. Especially with this wax. I just ran out of the J50 and my local supplier now only carries the 4630 so that is what I have to work with. In the past I haven't had much luck using a single wick in containers. I never seemed to get a full melt pool no matter how large of a wick I put in. I do have CD10, CD12, CD14s. These are not sooting just mushrooming. I am getting a good scent throw. Today they have reached the middle and still got a good pool of wax. Thanks, Wendy