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I'm a cold water shaver in the summer, from the tap, with nice warm lather from my skuttle.

Looks really nice, might suggest a false lip (think that is what it is called), where the lip of the bowl curls in just a bit, so when your making your lather the lather stays in the bowl instead of...

Very nice, must be nice to have an artist in the family to craft your skuttles. I had the same question as Phrank's edit about the ridges.