LNG storage tanks are used at refueling stations for vehicles that run on LNG, such as trucks, buses, and other heavy-duty vehicles. It could be designed in vertical or horizontal type with different volume. The space between the inner vessel and outer shell is often vacuum-insulated to minimize heat transfer, helping maintain the liquid state of the LNG / LCO2. Also, perlite or multi-Layer Insulation are commonly used insulation materials that further reduce heat ingress.