Although I'm not a professional, but I am the mug too small. With a mill brush size L has garkeinen space to work and even with a simple rather small brush from the drugstore, it is not better. As soap container partially suitable, provided that the soap fits.
I paid just under 8 and consider the price (regardless of the above-described problem) in order. That the mug now expected to cost 40, I can understand in any way.