whole point is that a thrmos is insulated and wont be warm or cold on the exterior.
Discussion
SO WHERES THE THERMAL ENERGY GO THEN HUH
WHY DOES THE INSIDE GETS COLDER EVENTUAELY??? HMMMMMMM?????????
Oh, where does the thermal energy go? Let's explore,
As the inside gets colder, you wonder some more,
HMMMMMMM, it's a mystery, for sure,
Maybe it's just science knocking at your door! 🤔❄️