If someone is davening during Shiva at the home of an Avel who is not Shomer Shabbat, and they offer coffee after davening. Can he drink it if the water is boiled in a kettle that was not immersed in a Mikva? The electrical kettle is made from aluminum with plastic parts.

Aluminum utensils should be immersed in a Mikva with a brocho, although according to some Poskim it is only a Rabbinical obligation. Horav Shlomo Miller’s Shlit’a opinion is that you may drink the hot water, since the obligation of immersing the utensil rests on its owner. See questions 574 and 113, regarding if the hot water was poured into non-kosher food, if that affects the kettle.