Articles by others on the same topic
A vacuum flask, also known as a thermos, is a container designed to keep liquids hot or cold for an extended period. It typically consists of two walls, an inner and an outer layer, that create a vacuum between them. This vacuum minimizes heat transfer via conduction and convection, effectively insulating the contents. Here are some key features of vacuum flasks: 1. **Insulation**: The vacuum layer serves as an insulator, preventing heat transfer.