Who invented the vacuum flask also known as thermos?
A vacuum flask, also called a thermos, is a storage vessel which provides thermal insulation by interposing a partial vacuum between the contents and the ambient environment. The vacuum flask was invented by Scottish physicist and chemist Sir James Dewar in 1892 and is sometimes referred to as a Dewar flask after its inventor. The first vacuum flasks for commercial use were made in 1904 when a German company, Thermos GmbH, was formed. Thermos, their tradename for their flasks, remains a registered trademark in some countries but was declared a genericized trademark in the U.S. in 1963 as it is colloquially synonymous with vacuum flasks in general. In fact, it is far more common for Americans to use the term thermos than vacuum flask. Sources: http://en.wikipedia.
