Question

Why the thermos flask commonly called vacuum flask

Answer 1

Thermos flask commonly called vacuum flask because vacuum prevents conduction. The tight stopper prevents air from entering or leaving the flask ,so there is a no chance of convention.

Answer 2

Answer:hahahajahahaha looser donkey haters real answer is that because the first company to mass produce vacuum flasks was the thermos company so peopen used to call it thermos flasks later on the name became popular and now peopen still call it thermos flasksloosers haters donkeys ghaddas jumpy jelly kaboom kwebellpoper ppooooopers farter fatter monkeys⚠⚠❌❎