I spotted this mold in the baking section at Joann's. It's a rigid plastic no-bake collapsible pan. Has anyone seen these? I think it can be used for soaping. The corners don't seal completely, but that's nothing a little masking tape won't fix. They also have some silicone mats that fit in the molds. But they look like they may be more trouble than just using with parchment paper.
