What is Digg?82 Comments
- prabjot, on 10/10/2007, -2/+34Dugg for incorrect title. I don't see water boiling.
- oneshare325, on 10/10/2007, -0/+28I believe that that the water inside the bottle is absorbing all the heat instead of melting the plastic. Same thing with a flame and a balloon filled with water.
- arkmtech, on 10/10/2007, -0/+21I'd be a little wary of the quality of this "good advice"...
I could see using this method in an emergency, but heating plastic that's not designed to be heated/cooked is otherwise just asking to ingest any variety of toxins that could lead to God-knows-what down the road. Same goes for using a Styrofoam container, or any petroleum-based container - it's just common sense.
Thanks for posting the vid, but I believe I'll stick to the good ol' paper cup or stainless steel can. - inactive, on 10/10/2007, -1/+20????
- AJS1, on 10/10/2007, -1/+16cool... just not sure how much i trust that the plastics arent leeching into the water within...
- gamer31, on 10/10/2007, -2/+13welcome to digg!
- mb3581, on 10/10/2007, -0/+10yea its true, you can also boil water (or coffee) in a Styrofoam cup over an open flame. same principal.
- superjeff, on 10/10/2007, -0/+10i think this is true. you guys may have seen the video with the bearded science guy, i think his name is krampf, where he holds a water balloon full of water over a candle. the balloon doesn't melt because the heat is transferred into the water so fast that the balloon never gets hot enough to melt. it's probably the same concept here. i dunno what not having air inside the bottle has to do with it though.
http://www.brightcove.com/title.jsp?title=709364407&channel=627593783 - uberlord, on 10/10/2007, -0/+10I wonder if you can do it with a Nalgene Bottle, seems a little more safe, but a potential waste of money, those bottles aren't free... unless you get them free... then they're free
- salmonmoose, on 10/10/2007, -0/+9Yeah, next time I need an emergency cup of tea, I'll be sure to try it out :)
- SLYK, on 10/10/2007, -1/+9ha. because *that* wont give you cancer.
- tolkan, on 10/10/2007, -0/+7If there's air inside the bottle, the air will heat first and evaporate, cause pressure to increase inside the bottle and the bottle will burst, causing the cataclysmic end of the Earth.
- SonicRush, on 10/10/2007, -0/+7You can also boil water in a paper cup in a campfire. I've done that before, but never tried a water bottle.
- sdrawkcaB, on 10/10/2007, -1/+8Hopefully none of the chemicals in the plastic make it into the water... Anybody know this for sure?
- mayaesh, on 10/10/2007, -11/+17Wow!! is this true? How can the bottle not burn?
- TradaPIB, on 10/10/2007, -0/+5Why does the poor fellow get dugg down for asking a question?
- DarkLance, on 10/10/2007, -0/+5oh! so that's why my sauce pan at home works so well!
- mindsnare, on 10/10/2007, -3/+8you're an arrogant *****, you'll fit in nicely here.
- NoctemSaiyaku, on 10/10/2007, -1/+6If i'm in the wild, tea is the last thing i'd be thinking about
- DarkLance, on 10/10/2007, -0/+4at least not when on fire...
- fluffythekitten, on 10/10/2007, -1/+4unfortunately you can't - nalgene bottles' walls are too thick to conduct the heat to the water fast enough so they'll begin to melt where hot untill the walls are thin enough for that ;-Þ
- Cyclonic, on 10/10/2007, -1/+4how about not being an ass. Ass.
- rawM3TAL, on 10/10/2007, -0/+3You can do this with even a paper cup OR a paper bag. Try it next time you go camping.
- inactive, on 10/10/2007, -0/+3Could you superheat the water this way?
- rockstar1o9, on 10/10/2007, -1/+4Plastic bottles might not be the way to go since certain plastics contain a chemical called Bisphenol A, known to be a Developmental, Neural, and Reproductive Toxicant.
"Scientists have linked very low doses of bisphenol A exposure to cancers, impaired immune function, early onset of puberty, obesity, diabetes, and hyperactivity, among other problems."
Heat would release the chemical in an otherwise safe plastic bottle. And while it might be safe in a plastic bottle that doesn't contain the toxin, most people wouldn't know how to distinguish between various types of plastics. - Cyclonic, on 10/10/2007, -1/+3yup, its a great technique that surprisingly few people understand. heat transfer is a wonderful thing in the wild or in any survival situation. I don't care how many times this video repeats. if it saves someones life then repeat it forever.
- hoppdawg, on 10/10/2007, -0/+2It works, can also be done with a paper cup filled with water and the cup only burns as the water evaporates.
Phase changes take a lot of energy... - omnithought, on 10/10/2007, -1/+3It's the same thing as when Mr Wizard held a lighter under a water balloon.
- nectom, on 10/10/2007, -0/+2can boil water in just about anything that will hold water. Learned this in 8th grade science.
- grinndaddy, on 10/10/2007, -0/+2Kitten is right. I believe this has more to do with density - Air is less dense than water and so it will heat/cool faster. If you have a bunch of air in the bottle, the air will heat before the water, melting the bottle. If you leave the bottle on there long enough the water will eventually melt the bottle as well, once its temp reaches the bottle's melting point. Correct me if I'm wrong, but I'm pretty sure its not so much about pressure as density... Then again, pressure and density go hand-in-hand - That's why this method will cause water to boil faster than an open container and why you have to be careful for exploding boiling water.
- mogus, on 10/10/2007, -0/+2They probably would, to some degree, but if you're stranded out in the woods, and you need to sterilize water to drink, I'd take the chance.
- uberlord, on 10/10/2007, -0/+2Why? Camping is hardly the wild, if you go prepared it's just like at home but with some extra work involved. Grocery Stores are usually within reach... unless you go backpacking, in which case it's still a great occasion for tea =D
- henryhastlan, on 10/10/2007, -0/+1Well, you know that in camping you always need to save some place (-:
- twb010, on 10/10/2007, -0/+1I don't know why you are being dugg down, but its true. This is the same thing as a dry ice bomb, it just takes a bit longer to explode.
- Jumboto, on 10/10/2007, -0/+1Yea, I thought about opening a car radiator and spraying steam everywhere.... Just don't forget the bottle in the fire I guess.
- afx1, on 10/10/2007, -0/+1hey johnny campsalot, it's new to me so stfu!
- tehrob, on 10/10/2007, -1/+2Water expands getting cold. Not sure if it does the same getting hot.
- david76, on 10/10/2007, -0/+1Unfortunately, this is an urban legend spread by a celebrity who mentioned it on TV. It's just not true.
- devdavad, on 10/10/2007, -0/+1Ah not this, oldest trick in the camping book. Sure it works, it's just not that amazing
- bivouac, on 10/10/2007, -0/+1its true that it can be done. it is also true that plastic releases harmful chemicals at high temperatures. i wouldn't use this tip unless it was an absolute emergency.
- LordFate, on 10/10/2007, -0/+1re: donavan
It won't explode because water doesn't expand when heated. Air does, so if any evaporates it will, but the water will not. - grinndaddy, on 10/10/2007, -0/+1If I understand correctly, water actually contracts when it gets cold, but eventually freezes and crystallizes which makes it expand. Water expands getting hot (moving faster) and that's why it eventually turns to steam.
- rawM3TAL, on 10/10/2007, -0/+1Try it!
- manzoire, on 10/10/2007, -0/+1good to know, one day i shall use this to my advantage
- artofwar420, on 10/10/2007, -0/+1As somebody said below, I'd do this on paper cups. I don't mind wood. I do however mind the plastic residue.
- TypeEE, on 10/10/2007, -0/+1I have done it with a paper bag but the trick is that you have to keep the bag wet, so you really have to spray water on the exterior of the paper bag.
This looks cancerous to me. - afx1, on 10/10/2007, -0/+1phase changes piss me off!!
- veeshy, on 10/10/2007, -0/+1now.. how do I make ice in 5 minutes in the wild?
- DiamondIce, on 10/10/2007, -0/+1"BE CAREFUL: there will be built-up pressure after heating - and openeing can cause the water to instantly boil and shoot out of the bottle!"
That's why he:
1) Holds the bottle at an angle, pointed away from his body
2) Uses a towel to protect his hand - Nadare, on 10/10/2007, -0/+1From that bearded science guy, another video that shows the same thing plus an explanation.
http://www.krampf.com/experiments/Science_Experiment3.html -
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