A food grade stainless steel matted coil, similar to the cleaning Polypad, that tracks and diffuses waves given off by the large heating bubbles. The pad sits on the element and projects upward into the water space.
Since the coil mat is nearly all space, it will not adversely effect capacity. Any heat that transfers to the mat would be conducted throughout the volume.
There would have to be an indent in the bottom of the mat that fits the element. There would probably be a few generic shapes to suit the vary types of kettles and elements. But because of mat's light gauge wire, it may be twisted and bent to suit.
Now you can hear the radio while waiting for that relaxing cuppa.-- wjt, Jul 09 2012 Oh, THAT poly pad... http://polycare.com...pad-replacment.html [normzone, Jul 09 2012] Mmmm, limescale.-- pocmloc, Jul 09 2012 Nano seed pits on wire produce beautiful calcium carbonate fractals while softening the water.-- wjt, Jul 09 2012 I wonder how many of the world's most amazing technological advancements have been motivated by the desire for a better cup of tea...-- Alterother, Jul 09 2012 Infinite improbability drive, for one...-- RayfordSteele, Jul 10 2012 I'm still awaiting the multi-spout partitioned kettle, so hot teas and coffees can be served together.-- Phrontistery, Jul 12 2012 Toss a stainless scouring pad into a kettle, to see if it works. Worst that can happen is a short and a blown fuse or tripped circuit breaker.-- UnaBubba, Jul 13 2012 random, halfbakery