I grated my Truefitt & Hill puck using the fine side of my grater, then pressed it all down into a small dollar store ceramic sugar bowl with my thumbs. It took a while, but now the soap is reformed and pretty close to as hard as the original puck. I have a ton of samples with which I've done the same. I bought five of those sugar bowls, plus I had an old crystal one that I use, so I can say that the grating technique definitely works.