Initially assumed it was due to some sort of contamination or production defect.
Turns out people leave perishable and fermenting foods in the thermos, and after a while when opened, the pressure lifts the lid of the thermos at quasi-unimaginable speeds, striking the curiously unsuspecting humans straight in the face, with some instances causing permanent damage to vision.
Coffee is hot, but a pressure release system is cool too..
I really hope we get a video out of this to see how bad it actually is and how much "pressure" is needed for this.
> Incidents/Injuries: Thermos has received 27 reports of consumers who were struck by a stopper that forcefully ejected from these containers upon opening, including complaints of impact and laceration injuries requiring medical attention. Three consumers suffered permanent vision loss after being struck in the eye.
That's an awefully large amount of reports about this. I wonder what about the design makes it a rocket compared to what I would assume is a pretty standard design?
> The Stainless King™ 470ml Vacuum Insulated Food Jar is the ultimate day to day companion to keep your food at optimal temperatures. Keep fruit fresh and vegetables cool for up to 14 hours while you take on the day. For your favourite soups, pastas or stir fry, they’ll stay warm for up to 9 hours – ideal for taking last nights left overs. You can be sure that your food will be perfect for consumption at lunchtime after you pack it in the morning. The wide mouth makes it easy to fill and clean, and comes crowned with a stainless steel lid that doubles as a serving bowl. Plus, it comes with a handy stainless steel spoon that fits neatly into the lid compartment.
It's meant for storing food, for anyone who is confused why someone would be.
> I wonder what about the design makes it a rocket compared to what I would assume is a pretty standard design?
Injuries nonwithstanding, the quality of the seal means it was an exceptionally well designed item for the purpose of storing 99% water.
side note: there's a reason you get a visit from the FBI if you buy ten pressure cookers (e.g. if you find a great Black Friday deal and have a large family and plan Christmas gifts...)
The pressure build up can be quite a lot from fermentation. I’ve accidentally fermented drinks in glass swing top bottles. And upon attempting to open the bottle the pressure ripped the stopper and the metal parts right off the bottle at high speed.
If you were purposely fermenting something, you could build enough pressure to pop the bottle.
I'm a little surprised it's a recall - is there some expectation that it should have pressure release? Can you not sell simpler products legally?
Yes, the article seems to be not detailed enough. They show the pictures, and it is evident what the pressure release valve is, but I agree that by this logic any container or any steel water bottle is dangerous. Maybe there is some other additional feature that makes it particularly dangerous compared to other models (like, the new seal keeps higher pressure, or the lid needs fewer rotations to disengage, etc.) that is not explained here and makes all the difference. Older models didn't even have a pressure relief valve, did they?
I guess the amount of rotation needed between “airtight seal gets broken” and “lid can come off” is fairly short for these thermos.
If the difference is, say, a full 360° turn, pressure will get relieved before the lid can come off.
See also https://news.ycombinator.com/item?id=48006887. Apparently, many bottles have discontinuities in the threading to allow for that.
> is there some expectation that it should have pressure release?
Scroll down in that article to the section with photographs of "recalled" and "not recalled" lids side by side.
Why is there an expectation that it should be a required feature?
The bottles were sold as "drink and food" bottles, but expiring/fermenting food turns the food bottle into a pressure vessel.
I was initially surprised too, because I mostly know Thermos from their coffee/water/etc bottles, but apparently they're also selling these with the intention of storing perishable goods, and in that case a pressure relief system of some kind is a necessity.
Often bottles have special threads with holes in them to let out the pressure when you twist them open, but it appears they didn't do that here.
Well for one, so it doesn’t get recalled after getting a reputation for making people blind
[flagged]
From the Consumer Product Safety Commission https://bsky.app/profile/cpsc.gov/post/3mkpsy7mgkk2j
"Is this user error?"
No. If we're recalling a product for a safety issue, it is not user error. There is an engineering error, or a design error, or a manufacturing error. Whatever the product is doing it should not be doing.
It's trivial to design a cap that leaks before it becomes mechanically free, and most lids are so designed. If this one becomes mechanically free at or before the seal allows any pressure differential to equalize, then it's an avoidable design defect that fails to meet current minimum standards.
I think most people have the expectation of not getting a cap in the eyes when opening something.
> Why is there an expectation that it should be a required feature?
What point are you trying to make here ?!?!
Given that it should be there, it is quite clearly a product feature on Thermos jars.
So, of many examples that cross my mind.... let's say you were a long-term user of Thermos products. There's your "expectation".
I assume it probably features in the product literature that comes in the box too.
> Given that it should be there
I've never seen a thermos-style container with a pressure relief in my life. However, I'm European, it appears that in the US (a country where you have to write disclaimers on microwaves that you shouldn't dry hamsters in them) common sense has been going down the toilet.
Frankly, I'm all for a bit of darwinism here. It's bewildering that there are people who think it's a good idea to open a thermos that has been fermenting for days if not weeks without a lot of caution!
Thought the same, but the recalled bottles were "food and drink" bottles, and they do usually have a pressure relief system of some kind.
Seems to be like they sold a bottle designed for a pressure relief cap with the wrong model cap, turning food storage containers into launchers.
Most lids you've ever used have pressure relief. It's not an extra part or valve or anything, it's just the simple geometry to ensure that the seal opens before the lid becomes mechanically free.
Thermos has only been producing flasks since 1904. There shouldn't be an expectation that they already have this on a checklist of things to watch out for in new designs. /s
One word for you .... context.
I said "given it should be there" because Thermos have just issued a recall notice where they openly admit liability and they openly state it should be there (see side by side photos in the recall).
I was never seeking to pass judgement on the factual element of whether "it should be there" in the pure definition of the term.
I was just saying "it should be there on THAT product because Thermos says so".
Because blinding people is bad and causes expensive lawsuits? How is this even a question.
The whole point of Thermos is to keep things warm for a long time. That means pressure. It's a basic safety feature.
> The whole point of Thermos is to keep things warm for a long time. That means pressure.
That by far is not enough to forcefully yeet out the cap, probably not even if you take it to an Antarctic research base in -40 °C outdoor weather.
People forgetting about content that ferments however? Kaboom.
On a planet where fermentation exists, such as planet Earth, the only planet on which we, humans, reside and therefore where these containers are made and used, that means pressure.
Happy now?
Isn't the point of a thermos to put "perishable and fermenting foods" in it, like coffee or tea? Like this could totally have been me, like make a thermos-full of coffee one day, then forget about it only to come back to in some weeks just to open it and have one of my eyes blown off
good luck of anything fermenting after dousing with boiling water..