Electrical kettle. 
An electrical kettle made of stainless steel with 2 heaters.
One heater is for boiling and the other for keeping water hot during Shabbat.
The kettle has a thermostat protecting the heater in case that the kettle is connected to power but has no water.
The kettle is made in 9 various sizes from 6 to 60 liters.
The kettle has proved itself for 40 years.