Milk glass was named for its milky white color. It was first made in England during the 1700s. The height of its popularity in the United States was from 1870 to 1880. It is now correct to refer to some colored glass as blue milk glass, black milk glass, etc. Reproductions of milk glass are being made and sold in many stores. Milk glass can be opaque or translucent and was very popular at the end of the 19th century. Related pieces may be listed in the Cosmos, Vallerysthal, and Westmoreland categories.