This is a one-of-a-kind bar I tinkered around with last week -the colored bits are a chopped-up bar from a marbled batch I made a couple days earlier. This is pretty much a "proof of concept" experiment to see if it would be worth trying to make something to this effect. So far, points learned are: Give it more new soap around the edge (right now, mainly a visual thing), and don't use a recipe with Castor Oil for the "filling" - :? it set up almost too fast to get all the in-between spaces properly filled!
I don't know how well it will hold together (to quote Han Solo, "Hear me baby, hold together!) but I just couldn't resist trying out an idea I had recently. T-minus 4 weeks until I know for sure! The soap ball was made with the trimmings from the edges and some other scraps, covered with a slice I took off the bar with my soap planer. I didn't think of THAT until I saw the near-perfect slice hanging from the bottom of the planer!
I figure, worst case if it doesn't hold together in bar form, using this procedure should make for some interesting soap balls!