Gas containers, also known as TANKS, are large vessels used to store and transport gases. They are usually made of metal or plastic and come in a variety of shapes and sizes. TANKS are commonly used to store and transport natural gas, propane, and other combustible gases. They are also used to store and transport hazardous materials such as chemicals and fuel. TANKS are designed to be strong and durable, and must meet safety regulations to ensure the safety of those who use them.