Thermos (vacuum flask)
Termo (botella de doble pared con vacío)
- Date
- 1892-1904 · confidence high
- Place
- Berlin, Germany
- Credited to
- James Dewar; Reinhold Burger and Albert Aschenbrenner
- Field
- Tools
What it is
A double-walled bottle of silvered glass with a vacuum between the walls that barely transmits heat and keeps liquids hot or cold for hours. Dewar devised it in 1892 for the laboratory; the Germans Burger and Aschenbrenner turned it into a household product under the Thermos name (1904).
Dewar did not patent it; commercialisation and the brand were Burger's, whose product reached the market in 1904 with Thermos GmbH.
What it led to
- hot and cold drinks on outings, at work and on journeys
- cryogenics and storage of liquefied gases with the Dewar flask
- stainless steel thermoses and insulated bottles