In 1777, Dr. Hugh Smith invented the “bubby pot “ - a name derived from an old world euphemism for the female breast.  The pot was urn shaped, like a coffee pot, with an external handle and spout arising from the bottom towards the top and terminating in a rounded knob perforated by several holes.
Another variation is the “Mammala” which literally translated means “little breast” or “little mother.”  This tin nursing can indigenous to the Pennsylvania Dutch Country from about the time of the American Revolution until the late nineteenth century. A short spout extends from the side of the can, ending in a rounded pewter knob with a small perforation.  Inside the can, the spout is connected to a vertical tube which extends to within a half-inch from the bottom. A convex lid is typical and most have a handle located on the side opposite the spout or at a right angle to the spout. Each has individual design characteristics.