Nitrogen, or Nitrogenium, is an inert two-atom gas without color, taste or smell: it cannot be seen unless it is frozen and liquefied. It requires special storage conditions, and special nitrous oxide cylinders create just those conditions and protect it from adverse external factors such as high temperature and pressure. The cylinder does not burn, ignites only when there is enough oxygen and reacts with other gases and chemical elements only in harsh conditions. These devices can be stored in a special room as well as outdoors. But the importance of quality in this case is not inferior and really proven and serviceable cylinders are available at
https://site2.azot-market.ru/catalog/ballony-azota/.