Kitchen Whistler is a term used to describe a teapot, KETTLE, or teakettle. A teapot is a vessel with a spout and handle used for boiling and pouring hot water over tea leaves. A KETTLE is a metal pot with a lid and handle used for boiling water. A teakettle is a type of KETTLE made from cast iron or stainless steel, often with a wooden handle. All three of these items are commonly used in the kitchen and can produce a whistling sound when the water boils.