Dry containers, bulk containers, liquid cargo containers, refrigerated containers, and specialized types such as auto containers, livestock containers, and leather containers are available. General cargo containers are standard containers used primarily for transporting general goods, suitable for goods that do not require temperature control, often referred to as general-purpose containers. Bulk containers are designed to carry powders, granules, and other loose goods. Liquid cargo containers are used for transporting liquid goods. Refrigerated containers are equipped with refrigeration units and have low thermal conductivity materials on the inner walls, used for carrying frozen, insulated, and preserved goods. Auto containers are specifically designed for transporting cars and can be loaded in two layers. Livestock containers (pen containers) are designed for live animals, featuring ventilation, feeding, and manure removal systems. Leather containers are specialized for transporting goods with a juicy leakage nature, such as raw hides, with a double-bottom design to store leaked liquids.