I got a bunch of samples from Mama Bear, which by the way smell awesome. I opened the mail box and could smell it, not kidding. The rose soap smells like you have your nose in a flower, not kidding the best rose I have ever smelled. Anyway, the samples are in a little wedge shape, not the best for lathering. Can I melt the wedge into a mug and use? Microwave or boiler? Thanks!