Vacuum flask
device · 1892 · Electric age
A Dewar vessel with a vacuum layer.
What it is made of
- Mirror — has part. The silvering reflects heat radiation.
Principles and materials it uses
- Vacuum — uses. The vacuum between the walls does not conduct heat.
- Glass — is made of. A Dewar flask.
- Thermal insulation — uses. Insulation.
History: what it evolved from and what it influenced
- Dewar flask — evolved from. A household Dewar flask.