I'm always learning. I've never met acceptable consumer grade plastic container units. Only the hairspray-like junk (without any legal tests), and some high-tech ones, but nothing between.

I'd like to add some more on the use of the extinguisher. Fire usually starts in the engine compartment for various reasons (leave alone some misdesigned rear fuel tanks). After you have secured everyone in a safe distance, do NOT open wide the bonnet, because you will feed the flames with fresh air (like in a chimney). Try to keep a small opening and use short bursts. It goes of course only for small, starting fires. In case you see lively, armlength flames around, just flee. Nothing is more precious, than your life.