When transporting or storing containers, what is necessary to use?

Using a POL plug or dust cap is essential when transporting or storing containers because it helps prevent contamination and leakage of the contents within the container. POL plugs or dust caps create a secure seal over the opening of the container, which is critical in ensuring the safety and integrity of the materials being stored or transported. This is particularly important with gases and chemicals, where vapors can escape or contaminants can enter if the container is left unsealed.

In contrast, while sealing caps and tether straps may have their specific uses in securing lids or holding items in place, they do not specifically serve the purpose of sealing the container's opening. Shock absorbent materials are generally used for cushioning and protecting items during transport but do not address the integrity of the seals or the prevention of contamination. Therefore, the use of a POL plug or dust cap is the most appropriate and necessary choice in this context.