Alcohol storage tanks can be made from different materials, such as stainless steel or polyethylene, and must have specific characteristics to ensure the safety and quality of the alcohol: material: stainless steel is resistant to corrosion and guarantees the preservation of the quality of the alcohol. polyethylene is lightweight, hygienic, non-toxic and non-corrosive. shape: the tank must have a flat, sloped bottom to allow the alcohol to drain completely. capacity: tanks can be customized to meet the needs of each operation. safety: tanks must have safety valves; monitoring and alarm systems to prevent accidents. maintenance: tanks must be designed to facilitate maintenance. sustainability: tanks must be manufactured with environmental considerations in mind. in addition, tanks must be placed in a pit so as not to compromise their integrity or that of the lining.