Helium tanks are pressurized containers used to store and dispense helium, a lighter-than-air gas. These tanks come in various sizes, typically made of steel or aluminum, and are designed to safely hold helium at high pressures. They are commonly used for filling balloons, providing lift for party decorations, and in scientific applications. When using a helium tank, it is important to follow safety guidelines. Always ensure the tank is secured and upright to prevent tipping. Additionally, users should wear protective gear and avoid exposing the tank to extreme temperatures or open flames, as this can pose safety risks.