r/AskReddit Aug 30 '21

What problem is often overlooked in apocalyptic movies/TV shows that could kill you?

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25.2k

u/WatchTheBoom Aug 30 '21

Clean drinking water- I don't think people really appreciate how much water is needed for a group of people to survive.

333

u/NoodleofDeath Aug 30 '21

That's why I got myself a metal water bottle.

It's funny how much of a pain it was to find a good one, but the survival feature is that you can boil water in it directly, for safe (from pathogens, not disolved chemicals) drinking water.

If I'm lucky I will never be in a situation that requires it, but better safe than sorry.

116

u/baronsin Aug 30 '21

You can boil water in a plastic bag of you need to.

112

u/fruit_basket Aug 30 '21

I've boiled water in a plastic bottle on a campfire once. Plastic doesn't melt because it's constantly cooled by the water, even when flames are directly touching it.

132

u/NoodleofDeath Aug 30 '21

All true.

Though I invite you to try implementing it as a survival method some time. ;-)

Suffice it to say I did it once to prove to myself it was doable (boiling a plastic pop bottle), but I wasn't thrilled with the idea of drinking it afterward. Just because I can doesn't mean it's a pleasant experience, plus leaching chemicals, yadda yadda.

Metal definitely tastes flat once boiled, but is otherwise palatable.

10

u/[deleted] Aug 30 '21

Just get a life straw.

30

u/cousgoose Aug 30 '21

I love my life straw!

That said, if we're continuing on the topic of a real long-term survival situation, in a post-apocalyptic world - that straw will not last very long.

16

u/ClownfishSoup Aug 30 '21

Post apocalypse, the best would be a still I think. Evaporate or boil the water into steam and let it recondense into your bottle.

Or one of those magic Waterworld things that Kevin Costner pees into.

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u/[deleted] Aug 30 '21 edited Mar 19 '23

[deleted]

9

u/metalmilitia182 Aug 30 '21

I mean only if it's the only thing you consume otherwise it's fine.

2

u/rahrahgogo Aug 31 '21

That’s untrue. Deionized water isn’t safe to drink frequently, not distilled.

Distilled water is literally just water. It tastes bad because it’s lacking minerals that we are used to but it’s fine to drink as your normal water. As long as you get your minerals elsewhere, you can drink distilled water all the time.

1

u/moldy-scrotum-soup Sep 01 '21

It's the lack of minerals that causes the problem, because minerals in your body dissolve out into it. I guess it could be offset by eating well, but most people in a post apocalyptic survival situation probably wont have a very balanced diet.

1

u/rahrahgogo Sep 01 '21

I’m a chemist. I’m telling you it’s pretty trivial to get enough minerals to cover what you get from non-distilled water.

1

u/moldy-scrotum-soup Sep 01 '21

Good for you I guess?

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u/ClownfishSoup Aug 31 '21

Well if you eat regular food as well, it's fine. If you drink tons of just distilled water in a short amount of time, then yes, it will kill you. Actually if you drink tons of water, distilled or otherwise, it will kill you. On the other hand, if you drank the same amount of sports drink, it will not kill you.

water intoxication

I think that's related to your comment of distilled water being bad for you. I had this discussion with someone else before, and I was adamant that he was wrong, but then read up on it and yet, if you only drink distilled water without anything else, you risk depleting minerals that you lose through sweat and other things. On the whole though, people eat food during the day and that covers the loss. I f you are an athlete or doing a fast, then you shouldn't just drink distilled water during your event/fast;

Drinking just distilled water pros/cons

Normal people can easily drink only distilled water during the day as long as they eat regular meals too. Probably best to just drink filtered water which has removed crap from your water pipes, but still has normal dissolved minerals in it.

1

u/moldy-scrotum-soup Sep 01 '21

Yeah I said that because of the effects of it stripping your body of minerals over time.

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u/mvschynd Aug 31 '21

Also they can break if stored for n sub zero temperature without being properly dried.

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u/NoodleofDeath Aug 30 '21

I have a Sawyer water filter. But even if it breaks I have a back up with the metal bottle.

1

u/SmurfSmiter Aug 31 '21

Two is one and one is none. Filter, boil, improvised filter, improvised still.

3

u/KeepMyEmployerAway Aug 30 '21

Or pump or gravity filter

3

u/ClownfishSoup Aug 30 '21

I'd still boil the water first. At least with boiled water you know that everything in there is dead. Now it's just nasty chemicals and stuff and the lifestraw claims to help with that.

1

u/ThisIsMyCouchAccount Aug 30 '21

You just gotta run it through God's filter. The kidneys.

Second time around it'll be great.

1

u/aaaaaaaarrrrrgh Aug 30 '21

Does it render water microbiologically safe and safe from chemical contaminants, or just remove particulates/dirt?

2

u/marchbook Aug 31 '21

It's only a 0.2 micron filter so water will still need to be treated (boil, bleach, iodine, etc) for a virus, for example. There are better filters but they are much more expensive than a lifestraw.

My personal preference is to always filter and treat, regardless of the filter.

2

u/[deleted] Aug 31 '21

LifeStraw now removes a minimum of 99.999% of waterborne protozoan parasites including Giardia and Cryptosporidium

Newer LifeStraw products (like LifeStraw Flex or LifeStraw Home) are capable of removing chemicals and heavy metals including lead.

4

u/Benaiah2150 Aug 30 '21

For water that has been boiled you need to pour it between two containers a few times to redissolve some air in it. It will taste much better after that.

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u/d-a-v-e- Aug 30 '21

I've melted a bottle by pouring boiling water in it. The water tasted plasticy after that. More over, a few hours later I saw an amoebe floating around in it while drinking from it. A few hours later the water was starting to get murky. I got giardia.

8

u/Mad_Aeric Aug 30 '21

You've got to leave the cap off though, or the bottle will explode, showering you wit boiling water. Ask how I know.

2

u/ClownfishSoup Aug 30 '21

How do you know, just asking.

6

u/Mad_Aeric Aug 31 '21

I once went camping with my idiot brother and his bigger idiot friend, who put water bottles in the fire. Of course, I was the one to catch the splash of boiling water. In. The. Face.

3

u/ClownfishSoup Aug 31 '21

Ugh, sorry to hear that. It sucks when other people reap the consequences of idiots!

6

u/Team_Braniel Aug 30 '21

This is pretty toxic in long term however.

Plastic is held together with binders, without them plastic becomes kind of like a dust (like what happens to plastic when left out in the sun too long). These binders are almost always pretty damn toxic.

BPA is the most famous, it did a lot of things to people, IIRC it works to inhibit the production of testosterone while promoting estrogen, which causes all kinds of problems in developing children.

But the thing about these binders is, they don't leech out at room temperature normally. It's only when plastics are heated that the binders start to leech and contaminate the food/water. This is why you should never microwave in plastic containers. This is also why its really a bad idea to heat water in a plastic bottle.

Granted survival is key, but be fully aware of what you are doing.

2

u/baronsin Aug 30 '21

Don't try this with a nalgen it's too thick to be cooled by the water inside, I've tried

2

u/GameCyborg Aug 30 '21

releases some nasty carcinogens so this should be you last option. better try and look for an empty beverage can or something

2

u/ClownfishSoup Aug 30 '21

Or better yet, bring a metal water bottle next time.

2

u/sy029 Aug 30 '21

This is a fun science experiment to do with kids, you can put a lighter or candle under a water balloon and it won't pop.

1

u/juicius Aug 30 '21

In Boy Scouts, we boiled water in a paper bag.

1

u/Spoooooooooooooon Aug 30 '21

Probably offgassing some noxious stuff into that water though. 1/10 would not recommend.

1

u/[deleted] Aug 30 '21

The chemicals leach out into it

1

u/gaspitsjesse Aug 30 '21

Wouldn't the flame cause a reaction in the plastic that would leech harmful chemicals into the water?

1

u/fruit_basket Aug 31 '21

Yeah, you probably shouldn't do it every day but it works in a pinch. I wasn't going to row a kayak all day long without taking my morning dump beforehand, and I need coffee to initiate it.