Type A packaging inner container materials are:

• A. Glass, plastic or metal
• B. Paper or cardboard
• C. Wood
• D. Ceramic

Answer: (A)

Type A packaging requires the inner container to be a leakproof, non-porous material that can safely contain the contents under normal transport conditions. Glass, plastic, or metal are the typical inner-container materials because they provide a strong, sealable barrier that resists leakage and is broadly compatible with many liquids.

Other materials like paper or cardboard, wood, or ceramic don’t fit as inner containers for most Type A hazmat because they can be porous, absorb liquids, or be prone to damage or leakage, which undermines the containment needed during transport.