A kettle, sometimes called a tea kettle or teakettle, is a type of pot, typically metal, specialized for boiling water over a heat source, with a lid, spout and handle, or a small kitchen appliance of similar shape that functions in a self-contained manner. Kettles can be heated either by placing on a stove, or by their own internal electric heating element in the appliance versions.
In coffee brewing, kettles are very useful for manual coffee brewing methods such as hand drip, French press, or AeroPress. With manual brewing, coffee extraction is performed in a device that doesn’t have any heating capabilities. Water needs to be heated separately. Kettles have various features that can improve the extraction precision. The most important features are: ease of handling, ergonomic, variable temperature, water temperature precision.