Soapstone tub and drain/overflow assembly
In a very small bathroom I am planning it actually will be more cost-effective to have a soapstone bathtub fabricated than to do something like the Kohler Greek tub and have it installed for use with a shower (It's a drop in and has no flanges).
My soapstone fabricator has made larger sinks than this tub, so that really isn't a problem, and the bathing area will be much larger than the comparable Kohler Greek, or Bootz or American Standard offerings (which are enameled steel which I would like to avoid)
The difference though is that the sinks have a large sink drain assembly but the tub will require a smaller drain assembly and associated overflow assembly. Kitchens sinks generally are without overflows, so I am not sure my fabricator thought about this when he said he could do it pretty easily.
This is probably more a question for the fabricator and a plumber but I was wondering if someone had a stone bathtub knew how this worked.