"2987fr" wrote in message
...

Not with a kettle they dont except with the amount of water you heat
and few kettles do a minimum amount of water very well at all.

Our kettle, a cheap one from Lakeland or somewhere, is quite happy heating
up 500-750 ml of water - just enough for a *large* mug of coffee. It has the
heating element embedded in the metal base of the kettle, so there is no
curly element within the water which has to be completely covered.