A 1000psi fire extinguisher uses ~5mm thick steel even for that relatively small diameter cylinder. A typical extinguisher is ~200ish psi with a wall probably ~

A 1000psi fire extinguisher uses ~5mm thick steel even for that relatively small diameter cylinder. A typical extinguisher is ~200ish psi with a wall probably ~1mm thick. This highlights that high pressure and "thin steel foil" do not go well together and don't scale in your favor. Pressure makes any failure considerably more dangerous.