Why are fire extinguishers heavy when there empty?

Fire extinguishers are heavy even when empty due to their robust metal construction, which is designed to withstand high pressure and potential impact during use. The materials used, such as steel or aluminum, contribute significantly to their weight. Additionally, the design includes safety features and a sturdy nozzle, which further adds to the overall heft. This durability ensures that the extinguisher can effectively contain and release the extinguishing agent when needed.