I did this for years until I started using creams or high glycerin content soaps. It would probably still work with the high glycerin soaps if I had a puck of one in the mug. What I do now is load up the brush in the soap container, this actually creates a fairly good lather, and then transfer to the mug. I don't use a scuttle, be cause I will be D*$@# if I will spend US$75-100 for a glorified coffee mug.