From a $2 japanese shop in Singapore (Daiso) - porcelain bowls.
The big one is heavy, with slight rough internal surface and is great for lathering. I lathered while gently holding it down on the countertop.
Retain heat relatively well.
A little too deep but it is great with a brush with long loft (>50mm)
Each SGD2. I use the small one for my MWF. Need to squeeze the soap in.