What type of container is required for shipping packages that contain dry ice?

The correct answer highlights a crucial aspect of safely shipping packages containing dry ice. When shipping dry ice, regulations require the use of containers that allow for the release of gas, as dry ice sublimates into carbon dioxide gas, which can build pressure inside a sealed container and potentially lead to an explosion.

An unsealed container is appropriate because it allows any gas generated from the sublimating dry ice to escape. This safety measure prevents the accumulation of pressure, which is essential for the safe transport of dry ice. Additionally, the Miscellaneous Dangerous Goods label is necessary as dry ice is classified under the regulations as a hazardous material due to its asphyxiation hazard when in high concentrations in confined spaces.

This choice reflects the best practice for handling and transporting dry ice while ensuring compliance with safety regulations to minimize risk during transport.