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What is the proper English name for "кипятильник"?
Кипятильник is an electric device used to boil water to make tea or to cook simple food like boiled eggs.
It is a coil with a wire which heats a lot when you plug it into electricity socket. It is usually put into a glass of water to make it boiling and to make a tea or boil an egg,
The device is very dangerous, it is strongly recommended to switch it off before you touch a glass or water since the electric charge may kill you.
Usually it is used by Russian businessmen or corporate workers traveling abroad or domestic to make tea or cook an egg in a hotel room
here is a picture of "kipyatilnik"