I used a Muhle bowl, but did find it a little shallow. This resulted in my lather "trying" to pour over the top and I had to scoop it up with my brush and re-introduce.
I recently received a Edwin Jagger Mug as a present from my wife, with the little handle knot on the side. Its quite a bit taller, broader and has three "ridges" in the bottom to help things along with the lather. I really like this mug as it easier to hold onto and I get a awesome lather time after time.
I also like to work the lather into my face for a good minute or two before I start to shave. Don't think the bowl will get any use for a while.
Feather Professional Artist Club SS (Folding & Non Folding). AOM - 34C, 34G, 37C, 37G, Futur Satin & Travel. iKON DLC Slant & OSS Stainless. Proraso App. Soc. Plisson, Simpsons & Semogue Badgers.