A tile in sink is generally a cast iron drop in style sink with the intension of it being set on the base surface to be tiled. The tile is then applied within 1/8" of the sink and grout covers the balance so it appears that the sink and the tile are at the same level. It is very difficult to find this type of sink now. Eljer used to make them and perhaps Kohler. This type of sink is not designed for any other type of installation as the sides of the flanges are not finished.