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Why does a plastic water bottle suck inward on itself, with it being full of water and unopened for years? Answered


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user
rickharrisBest Answer (author)2011-03-14

PET plastic isn't necessarily gas proof long term but it would take some external lack pressure to suck air out - I go with pressure or temperature changes over time.

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Bettix (author)2017-03-06

http://www.bettix.co.uk/plastics-fluorination/why-fluorination-the-problem -Here's the only solution to stop the paneling of bottles, get your bottle fluorinated.

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DM6 (author)2014-11-15

Here's the answer: It's called panel sink?.........what? why that name? Oh well, here is what I found.

http://www.tricorbraun.com/addressing-panel-sink-in-plastic-bottles.aspx

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DM6 (author)2014-11-15

I am wanting to know the answer to the same question. I believe this experience of collapsed unopened water bottles is a little more detailed than we are told. Does the plastic degrade? Lots of people probably have cases of water that have had this experience after storing for a few years.

Is it dangerous to consume?

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aeray (author)2011-03-13

Has it been moved to a lower altitude?

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Re-design (author)2011-03-13

Because leaving water in a plastic bottle for years just SUCKS! Don't do it.

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frollard (author)2011-03-13

Lots of reasons, I think most likely is nacho's suggestion that the bottle is permeable and lets some gas out.

Gasses dissolve in the liquid, thus acting as a liquid and not exerting their pressure on the bottle walls.

The plastic in the bottle could be actively 'eating' the gasses - I have no grounds to support this theory, but given that some plastics off-gas, it makes sense they might react with and store some gasses.

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NachoMahma (author)2011-03-13

. Could be that some germs have used up all the Oxygen, Nitrogen, &c.
. Maybe plastic bottle are ever so slightly gas permeable and the gas gets pumped out with temperature fluctuations and/or variations in pressure.
. Magic!

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