I am not mad at Dave or Dave, but at myself. I’m an engineer. I hate “too hot” coffee and am not enthralled by cold coffee. I know about thermodynamics. And yet, did it occur to me to do something like this? No. I’d like to think I look for problems and solutions, but I completely whiffed on this. I blame my god-given lack of inspiration, creativity and entrepreneurship.
What do these do and how do they do it?
Well, in a perfect world, our coffee maintains a constant (hot) temperature for as long as we care to drink it. A Goldilocks temperature. Not too hot, not too cold. However, according to thermodynamics, thermal energy moves from high to low temperatures. That is, assuming you’re not drinking your coffee in a very hot sauna, it will relentlessly transfer heat to your surroundings (via radiation, convection, and conduction) until it has assumed the same temperature as its surroundings.