Dewarflaskor

Dewarflaskor, also known as a dewar flask, is a type of vacuum flask designed to keep liquids hot or cold for extended periods. It is named after Sir James Dewar, the Scottish chemist who invented it in 1892. The flask consists of two flasks, one nested inside the other, with a vacuum between them. This vacuum insulation minimizes heat transfer, making it an effective tool for both hot and cold liquid storage.

The outer flask is typically made of glass or metal, while the inner flask is usually made of glass. The two flasks are joined by a metal or glass stopper, which also serves as a lid. The vacuum is created by removing air from the space between the two flasks, which significantly reduces heat conduction. Additionally, the walls of the flasks are often silvered to reflect radiant heat, further enhancing insulation.

Dewarflaskors are widely used in scientific research, laboratory settings, and everyday applications. They are particularly useful for storing liquids that need to be kept at a constant temperature, such as water for hot or cold beverages, or chemicals that require precise temperature control. The design of the dewar flask allows for efficient insulation, making it a reliable and practical tool for various temperature-sensitive applications.