So glad you enjoyed it! I highly recommend that you put a layer of parchment paper or freezer paper between the metal rack and your fresh soap bars. Contact with metal (other than quality stainless steel) is a cause of rancidity in soap, aka Dreaded Orange Spots (DOS). Many cooling racks that purport to be stainless only have a thin coating that cracks and chips over time, exposing the other metals underneath. Best not to chance it.
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I have been using the boxes from the store. The ones that are cut down to about 1.5 in. My favorite is the canned cat food boxes. They hold 10 bars plus enough room for scrap pieces for samples. I just put a few sheets of bakery paper, the same stuff I use to wrap my soaps, in the bottom and I also use them to house my EOs and FOs. I use the dollar store metal trays when I am setting up my next batch for my additives and EOs and tools. In my profile pic is an example of the boxes. They work great and after a few times I just use another one. Also I transfer the bakery paper to the container I use to store them. The fragrance is in the tissue paper and keeps the container smelling so good. I use plastic shoe box size boxes to store my soap, also from the dollar store. This has kept my costs down for trays and I have wire shelves I dry them on. Who doesn't like FREE?