What type of materials are often transported in Dewar containers?

Dewar containers are specially designed for the transport and storage of cryogenic liquids, which are substances that exist at very low temperatures and must be kept in a liquid state, such as liquid nitrogen or liquid helium. The insulating properties of Dewar containers minimize heat transfer, which is crucial for maintaining the extremely low temperatures required for these substances.

This design enables safe and efficient handling of cryogenic materials, making them suitable for a variety of applications, including scientific research, medical uses, and industrial processes. In contrast, gasoline, water, and solid waste do not require the same type of handling or storage solutions as cryogenic liquids, making them unsuitable for Dewar containers. Each of these other materials has different storage and transportation requirements that do not involve the extreme cold management typical of cryogenic liquids.