The term 'Whistler Kitchen' is a reference to the teapot created by the English artist and craftsman, James Whistler. The teapot, which was made in the late 19th century, is considered to be one of the most iconic pieces of his work. It is characterized by its unique shape and intricate details, and is often used as a symbol of Whistler's artistic style. The term 'Whistler Kitchen' is derived from the fact that the teapot was originally intended to be used in a kitchen setting.