If it doesn't melt easily (try a sliver or two first), take a coarse cheese grater, shred the soap puck, and pack the shreds tightly into your mug. When you add a few drops of water, it will solidify and work just as well as the factory-formed puck.Says it can be used for shaving and it also says made in the USA on the box. I hope it will melt down well so I can put it in my new mug.