Schock Cristadur NanoGranite 2674 Just look at the ultra smooth surface.This is not only a beautiful sink but it's also very practical. Cristadur is super tough and will not mark or scratch even when cut and chopped upon. You will notice that all the models have smooth drainer profiles - this is both a statement of style and an aid to easy function. Cristadur is impervious to staining - the surface cannot be penetrated by staining agents, from foodstuffs to inks. Perhaps the greatest advantage of Cristadur Nano Granite technology is its super smooth silky surface and, because the surface is absolutely smooth, dirt and residue cannot be trapped on the surface.The very real advantage this brings is the ease of maintenance - SIMPLY wipe down regularly after use with a damp cloth. Unlike stainless steel a Cristadur sink brings dynamic colour into the kitchen and perhaps best of all does not leave unsightly watermarks.