Going to pick up my new Proraso ciotola barba 400810 from the mail in couple of days to replace the square plastic bowl I repurposed from the kitchen. Currently my go to is a round ceramic cereal bowl. It's really easy to hold with one hand like an apothecary mug. Works great for lathering up creams and croaps, which I scrape from their containers with a spoon then smear in the bowl.
Little wren pottery do some great bowls and scuttles and will take one off custom jobs also Giles Shaving make some great stuff, I have a bowl from Little Wren Pottery and one Scuttle from Giles Shaving, check them out. P.
Bought a really nice Suribachi type bowl in a shop in Mahon a couple of years back, just for shaving purposes. Not an arm and a leg but not cheap. Got it home and the wife decided it was a present for her. Arghhh!!!!!