I dropped and broke my first bowl so I bought another since I like the design. The first one had a opening large enough to just fit a Pre de Provence Shaving soap tin and it helped keep my wash basin area cleaner and less cluttered. The second one had a more pronounced overhanging lip that facilitates scraping my brush off when whipping up a lather but it does not allow my Tin to be placed inside of it like the first one. This is an indication that yes, they are all hand made and no two are alike. When left to soak in hot water, it will keep the lather warm for a while but since my water isn't that hot it can't keep it warm for the second shave pass ( I use the bowl to whip up a lather rather than hold the soap puck itself). The second lather is juuuuuust barely warm or a tiny bit cool. The bowl does keep the lather from spilling out both during the Lather whipping stage and the face application stage. I also use this bowl to sanitize my razor; it has both the depth needed to fully submerge the shaving head in hydrogen peroxide (or barbicide if you prefer that). Other than those features, it does what any other bowl or mug does, but it's a nicer looking bowl, handles well and since its made in the USA, it means I'm helping employ another 'murican :-) .
MY only complaint is that it doesn't let me place my pre de provence tin inside like it did the other.