Chest that served as seat, table, trunk, or storage. The term coffer in furniture refers to a chest or trunk that is typically used for storing valuables or as a decorative piece. It is usually made of wood and may feature intricate carvings or ornamental details. Coffers were commonly used in earlier centuries to store items like clothes, blankets, or important documents. Today, they are often used as coffee tables, storage units, or as unique decorative elements in homes.