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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

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".

_ink_ 6mo ago
I would assume that it was some cost optimization that led to the removal of the pressure relief.
- fuzzfactor 6mo ago
  OTOH I would assume that they didn't add the pressure relief until after finding out that people were getting hurt. Seems logical to then be recalling any that are out there without the safety feature.
Aachen 6mo ago
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
- gcr 6mo ago
  I bet you’ve been using these your whole life without knowing it: in non-USA thermoses, the lid releases pressure before becoming mechanically free. You’d hear a “pop” and then the lid has to be twisted slightly further before it can be removed. Not all safety features have to be obvious/obtrusive.
  - Aachen 6mo ago
    I see no hole in the metal anywhere on the inside. The only non-metal part that touches the inside is a rubber(?) gasket/ring thingy that sits above the thread and is squeezed by the lid, which I take out to clean and there's only metal under there as well. How would this work? Did I get the exceptional model that doesn't have one and just didn't look at other models closely enough?
    - gcr 6mo ago
      Huh. I’d imagined the threading in the cap could be made this way

_ink_ 6mo ago

I would assume that it was some cost optimization that led to the removal of the pressure relief.

fuzzfactor 6mo ago
OTOH I would assume that they didn't add the pressure relief until after finding out that people were getting hurt. Seems logical to then be recalling any that are out there without the safety feature.

Aachen 6mo ago

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

gcr 6mo ago
I bet you’ve been using these your whole life without knowing it: in non-USA thermoses, the lid releases pressure before becoming mechanically free. You’d hear a “pop” and then the lid has to be twisted slightly further before it can be removed. Not all safety features have to be obvious/obtrusive.
- Aachen 6mo ago
  I see no hole in the metal anywhere on the inside. The only non-metal part that touches the inside is a rubber(?) gasket/ring thingy that sits above the thread and is squeezed by the lid, which I take out to clean and there's only metal under there as well. How would this work? Did I get the exceptional model that doesn't have one and just didn't look at other models closely enough?
  - gcr 6mo ago
    Huh. I’d imagined the threading in the cap could be made this way