Does a kettle{1} 1, whose body made of plastic, need tevila? (Do we consider the body, or the metallic resistor?)
[{1}1 A very classic electrical kettle, ie a jug with a warming resistor immersed into the liquid. There is an electric-connected base so that when the you put the kettle on the base, current flows through the resistor and water comes to ebullition. Afterwards you take the jug from the basis and you can bring it to the table.]