This allows you to make a compact coil assembly for use in induction heating or other resonant applications. Description from rmcybernetics.com. I searched for this on bing.com/images
High Frequency Induction Heating
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MIITO is simply but intelligently designed to heat any liquid directly in a vessel while cutting down on excess water and energy usage.
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Found it at Wayfair - Induction Heating Pressure Rice Cooker and Warmer
Induction heating coil improving RF performance with magnetic flux concentrator Fluxtrol Video - YouTube
Make an exceptional meal in half the time with this Zojirushi induction heating system rice cooker.