Inventor: Reinhold Burger
Date of Patent: 1st October 1903
The Thermos Flask is a very clever design that either keeps things hot, or cold.
It works by having two outer layers. The space in between these two layers isn’t air though, all the air is removed which means that heat energy can’t travel between the two outer layers.
The slogan that Reinhold Burger came up with for the Thermos was “Keeps it cold, keeps it hot – ice or fire needs it not”.