I am using a milk frothing metal pitcher to heat water for coffee in the morning.
The red/orange foot on the bottom of the Joule magnet bulges outward because the inside bottom of the pitcher is not flat. The pitcher has a bulge in the bottom center so Joule is standing over a space. (get it?)
I have ordered a different metal pitcher that supposedly has a flat bottom that arrives today; but I am a bit concerned about that bulge in the foot of the rubber thingy on the bottom of the magnet. As Joule cools down, the bulge flattens out again, but...? A problem waiting to happen?