These Pressure Vessels can store liquids in large quantity. Those substances that require a particular temperature are stored in them. These pressure vessels can keep the pressure inside it maintained for a very long time. The vessels are provided a sealed atmosphere due to which the liquid present inside can not react with air. For their safety, metallic painting is done on their surfaces so that no harm is caused to it. A lever is provided at the top of these vessels for the ease of transporting the substance present inside it. In addition to it, they have a compact shape and do not occupy a large area.