What must all containers used for storing substances in a fire station be?

All containers used for storing substances in a fire station must be clearly labeled to ensure safety and proper handling of materials. Proper labeling provides critical information about the contents, including the substance name, potential hazards, and handling instructions, thus enabling firefighters and personnel to quickly and effectively respond to situations involving these substances. Clear labeling also helps prevent accidental misuse and ensures compliance with safety regulations, which is crucial in a high-risk environment like a fire station.

While other options such as sealing containers tightly or using non-flammable materials might be relevant to safety practices, the priority remains on clear labeling as it directly contributes to understanding and managing the materials safely and effectively. Marking with expiration dates can be important for certain substances but is not universally applicable to all container types within a fire station.