when were the first thermos flasks produced for commercial use
Thermos L.L.C. Invented in 1892 by Sir James Dewar, a scientist at Oxford University, the "vacuum flask" was not manufactured for commercial use until 1904, when two German glass blowers, Reinhold Burger and Albert Aschenbrenner, formed Thermos GmbH. They held a contest to name the "vacuum flask" and a resident of Munich submitted "Thermos," which came from the Greek word therme, meaning "heat."
Refrigerator The history of artificial refrigeration began when Scottish professor William Cullen designed a small refrigerating machine in 1755. Cullen used a pump to create a partial vacuum over a container of diethyl ether, which then boiled, absorbing heat from the surrounding air.[3] The experiment even created a small amount of ice, but had no practical application at that time.