Hi.
They do, and in the case of those “camping-”, “trekking-”, “just-in-case-” rattle-can varities, that date may be as near as one year.
Or nothing at all, if the can has sat on the shelf for that year.
Unlike in the bigger, more convincing varities, there’s seldom any indicators for the pressure either, so there’s no way of knowing whether they’re actually pressurized or not.
IOW, whether they actually work when the need arises or not.
One IMO rather important thing to keep in mind is also the fact that the actual time to empty a can like that in order to extinguish the flames is just a few seconds.
Couldn’t find that exact extinguisher online, but it’s usually in the ballpark of 2-6 seconds.
So no matter the reason a fire extinguisher of any kind is needed or required, it’s also advisable to buy one extra, light a small fire, and find out how it actually works.
As will any other can intended to hold beverages.
Save for the intention to sell more units, there’s no reason why there couldn’t be a similar lining in these kind of fire extinguishers as well.
Like @MikeyH said, On The Other Hand.
One of the acronyms/initialisms I do like to use rather frequently, even though I’m probably a hair (or lack of it) too old that it would seem natural 
Absolutely true, but that’s a preplanned choice, people seldom understand what a mess a conventional foam or powder fire extinguisher makes.
If I had to choose, I’d pick a CO2 extinguisher for the possible lasering fires every time over the other varities.
Not at all a bad plan either.

Sure, but not thin, uncoated drawn ones.
It’s all about the metallurgy, and choosing the correct alloy for the intended purpose.
And the alloy dictates the manufacturing method.
Even the most common aluminium additives Silicon and Magnesium, will render the alloy difficult, unfeasible, or plain impossible to be drawn.
I don’t have the exact figures, but if I was a bettng kind, I’d be willing to bet that 99.99% of the aluminium canisters are drawn.
From an engineering viewpoint it does.
It’s possible -even though improbable- that the chemicals expedited the corrosion, my money is still on the water being the major culprit.
You won’t get an argument from me there, that’s absolutely spot on.
On the positive side, those cans were rendered useless before You had to use them
.
Now You can choose more suitable ones, and since You made the issue public, there’s a good chance that You saved someone elses money (not to mention machine, house, etc.) in the process.
And that’s a definitive win in my book.
Regards,
Sam
