Conical metal barrels Conical barrels are used for packaging and transporting food products, such as juices, concentrates, fruit (vegetable) purees and tomato paste. Additionally, conical metal barrels are widely used among petrochemical industry producers (for example, in bitumen packing, etc.) The standard capacity of conical metal barrels is 218 - 220 liters. The barrel is equipped with a plastic or steel cover.