I suggest using the same kind of
object as I did. A max teapot is
not good now because the mesh
has holes in it, it’s not ‘water-
tight’ and you don’t want that
on refractive objects. I made
this modified torus knot because
it will be an interesting shape
to test with, because of all the
curves and thin/thick areas.
If you want, use the exact same
settings as I did.