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..
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
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 have a pressure release valve, did they?
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!
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".
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.
Um, I'm sorry (by which I mean not at all) what? If you operate something to that degree of wrongly the results are on you. Do you expect hammers to be recalled because you might hit your finger with them? At some point it's on the user.
This is an O-ring sealed lid. It should leak once you get it slightly unthreaded. You'd basically have to get it off as fast as possible in order to have it go flying. If the cap is under pressure it'll need a lot of force, which means you'll need to grip it which should contain it.Did people never twist up (to build pressure) and shoot the caps off plastic drink bottles as a child?
If anything good on Thermos for choosing a thread form and plastics that still work nicely under serious force.
I know we all love to screech about safety as thought there's never any tradeoffs because the internet is a place of honesty like that but how much bacteria is this pressure valve gonna harbor? Who's gonna get sick from that?
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.
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.
I too from the headline assumed it was some sort of chemical contamination during manufacturing.
But then I read the words "The malfunction is due to multiple models of containers missing a pressure relief function in the center of the stopper."
How non-existent does your quality assurance have to be in order to miss such a critical, obvious and easy to identify flaw ?
Looking at the published photographs, you don't even need training to identify that manufacturing defect. A five year old could spot the difference between "lid has a hole" and "lid does not have a hole".
I've never seen a thermos bottle with a relief valve. Not sure if all manufacturers in Europe have nonexistent QA or if it's just not a thing that's commonly needed since you can't heat the contents up in there anyway (it's not like an insulated water boiler, which does have a release valve). Never considered that someone might leave food in there long enough to build up explosive pressure. Feels a bit like saying a missing cat detector function in microwave ovens points at them having no quality control
Had this happen to me once, though totally my own fault. Was brewing kombucha, and left it out in the bottles a little too long before burping.
Me standing there, kombucha and peach slices pulverized against the cap, kombucha leaving a large mark on the ceiling it all happened so fast, glad I was wearing my glasses.
No injuries except my pride, but it did take some hours to clean up.
I wouldn't do it in a thermos, but I guess those are mostly accidents?
It was bramble beer for me. Put a load of lovely ripe brambles in a batch of homebrew beer, one of the little pithy bits on the inside wedged up against the bottom of the airlock, and overnight the pressure built up enough to pop the cork out and spray the ceiling with brambly splats and beer.
Tasted okay though.
My mate brewed his bramble beer by putting his brambles through a juicer and only adding the juice and pulp, because he's cleverer than me and has a certain amount of foresight.
Happened to me once. I was emptying one of my child’s thermoses in the bathroom when it suddenly "exploded" and sprayed the contents all over the bathroom walls. Quite a remarkable day :)
I didn't consider it a defect, though. I can hardly imagine cheap products adopting this solution.
If it's a forceful opening and you're not holding the top tightly, then I imagine the top could launch upwards. I know from experience this can also happen if you put just a bit of boiling water in and seal it. The air expands under heat and will push the top out whilst you're unscrewing. A version of this top comes with a metal spoon & raised holder built in, providing some edges to hit you with and an extra projectile.
So who decided to cut costs by "simplifying" the lid design? A case of Chesterton's fence perhaps?
My partner has one of these so just checked it. It does have the pressure relief feature, but it turns out it's also missing all the seals anyway so never would have been a problem!
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..
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
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 have a pressure release valve, did they?
> 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?
> 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!
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".
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.
Well for one, so it doesn’t get recalled after getting a reputation for making people blind
Um, I'm sorry (by which I mean not at all) what? If you operate something to that degree of wrongly the results are on you. Do you expect hammers to be recalled because you might hit your finger with them? At some point it's on the user.
This is an O-ring sealed lid. It should leak once you get it slightly unthreaded. You'd basically have to get it off as fast as possible in order to have it go flying. If the cap is under pressure it'll need a lot of force, which means you'll need to grip it which should contain it.Did people never twist up (to build pressure) and shoot the caps off plastic drink bottles as a child?
If anything good on Thermos for choosing a thread form and plastics that still work nicely under serious force.
I know we all love to screech about safety as thought there's never any tradeoffs because the internet is a place of honesty like that but how much bacteria is this pressure valve gonna harbor? Who's gonna get sick from that?
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.
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?
I too from the headline assumed it was some sort of chemical contamination during manufacturing.
But then I read the words "The malfunction is due to multiple models of containers missing a pressure relief function in the center of the stopper."
How non-existent does your quality assurance have to be in order to miss such a critical, obvious and easy to identify flaw ?
Looking at the published photographs, you don't even need training to identify that manufacturing defect. A five year old could spot the difference between "lid has a hole" and "lid does not have a hole".
I've never seen a thermos bottle with a relief valve. Not sure if all manufacturers in Europe have nonexistent QA or if it's just not a thing that's commonly needed since you can't heat the contents up in there anyway (it's not like an insulated water boiler, which does have a release valve). Never considered that someone might leave food in there long enough to build up explosive pressure. Feels a bit like saying a missing cat detector function in microwave ovens points at them having no quality control
I would assume that it was some cost optimization that led to the removal of the pressure relief.
Had this happen to me once, though totally my own fault. Was brewing kombucha, and left it out in the bottles a little too long before burping.
Me standing there, kombucha and peach slices pulverized against the cap, kombucha leaving a large mark on the ceiling it all happened so fast, glad I was wearing my glasses.
No injuries except my pride, but it did take some hours to clean up.
I wouldn't do it in a thermos, but I guess those are mostly accidents?
It was bramble beer for me. Put a load of lovely ripe brambles in a batch of homebrew beer, one of the little pithy bits on the inside wedged up against the bottom of the airlock, and overnight the pressure built up enough to pop the cork out and spray the ceiling with brambly splats and beer.
Tasted okay though.
My mate brewed his bramble beer by putting his brambles through a juicer and only adding the juice and pulp, because he's cleverer than me and has a certain amount of foresight.
This is wild.. It looks like they changed their lid to be a bit cheaper ?
Looking at the version that's not recalled, I would guess it costs more to make.
Happened to me once. I was emptying one of my child’s thermoses in the bathroom when it suddenly "exploded" and sprayed the contents all over the bathroom walls. Quite a remarkable day :)
I didn't consider it a defect, though. I can hardly imagine cheap products adopting this solution.
I would have thought they could design the screwtop so that it would relase pressure before fully disengaging the lid from the flask.
That is what I was wondering. I would have thought it would need to be opened at eye level for the contents to hit the eye before being depressurised.
If it's a forceful opening and you're not holding the top tightly, then I imagine the top could launch upwards. I know from experience this can also happen if you put just a bit of boiling water in and seal it. The air expands under heat and will push the top out whilst you're unscrewing. A version of this top comes with a metal spoon & raised holder built in, providing some edges to hit you with and an extra projectile.
So who decided to cut costs by "simplifying" the lid design? A case of Chesterton's fence perhaps?
My partner has one of these so just checked it. It does have the pressure relief feature, but it turns out it's also missing all the seals anyway so never would have been a problem!