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- 8,250
Don't quote me but I'm pretty sure they are. Aluminum bottles are the ones with a coating for the reason KGD talked about. To keep acids from corroding the metal.
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Mini-skills challenge #3
- Thread starter kgd
- Start date
- Joined
- Feb 28, 2007
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- 9,786
First - thanks for our first few posters providing photo-ops of boiling water in their bottles. I really appreciate your contributions and getting into the spirit of the thread. You even beat me to the punch!
I didn't necessarily want this thread to go into a direction of BPA merits but then again I suppose it is sort of unavoidable since the thread is providing a recommendation of using this as a skill and to consider carrying a metal water bottle as a multi-function piece of kit to serve not only water transport but water purification, cooking etc. in a pinch.
MTWarden brings up an excellent point that double walled SS containers (think thermos or coffee mug) are dangerous because of the possibility of exploding due to gas expansion contained within the wall. DON'T use double walled containers for this purpose. Plus, they are counteractive to the point of the thread - the double wall serves as an insulation purpose and you want to use fire to heat things up. Again, this is a big threat and danger and avoid using a double walled water bottle.
The second issue is BPA exposure. I am a university professor and my discipline is ecotoxicology. As a result of this I am aware of the potential threats related to BPA exposure and older nalgene/lexon type water bottles and food containers are an exposure route. This extends to coated food tins and potentially some SS bottles that use a liner in them. In my professional capacity, I would highlight that these human health concerns are largely related to chronic exposures rather than acute exposures. Chronic means long term daily exposure; acute means a short term high dose with a drastic biological effect. On the acute side of things, this could be a potential issue for infants and pregnant women where toxicological information indicates that these groups are most sensitive. For the general population, the linkage between BPA exposure and health effects, there is some endocrine disruption impacts and a growing body linking chronic BPA exposures to cancer albeit in the latter circumstance the jury is still out at what dose. From an exposure perspective, BPA is rapidly cleared from your body and does not bioaccumulate. That means, in order to illicit chronic effects you need to have continuous exposures. Chances are very good that a single exposure to an even higher dose like what you might experience by dissolving the BPA laden liner of tin in hot water is not going to have much effect unless you get into the habit of doing this on a daily basis or multiple times during the week. Still, we do have to be conscious that our exposure to BPA is somewhat continuous because it is so prevalent in packaged food stuffs as well as a major component of sewage effluents that can be recycled into our drinking water. Do I worry about BPA exposures personally? No, I don't and I don't fanatically avoid BPA containers. I haven't thrown out some of my older nalgenes and am not adverse to using them for drinking water. I also often buy canned tomatoes, pea soup, canned beans and the like because I'm too lazy to cook from fresh. Then again, I'm an old guy, married and who cares if my testicles shrink a little (other than JCAV and Kurupted who seem to be fascintated by endocrine disruption and how aligator penis's are smaller now than they used to be), after all its better then them getting to be the size of a bowling ball! So - the need to avoid BPA is at this stage a bit of a personal choice. It ain't going to kill you (at least this one time it won't) and it is far less inherently dangerous than the threat that MTWarden describes for double walled bottles blowing up and spewing boiling water and shrapnel into you. But, if you are worried about BPA you can easily circumvent the risk by selecting a BPA free SS bottle and avoiding making a billy from a lined tin (stick to coffee cans which are usually unlined). I find that many knockoff water bottles advertise this as advertisment of BPA freeness of a water bottle product is an in thing to do right now.
Cheers, and lets see some more pics of people boiling water in their water bottle!
I didn't necessarily want this thread to go into a direction of BPA merits but then again I suppose it is sort of unavoidable since the thread is providing a recommendation of using this as a skill and to consider carrying a metal water bottle as a multi-function piece of kit to serve not only water transport but water purification, cooking etc. in a pinch.
MTWarden brings up an excellent point that double walled SS containers (think thermos or coffee mug) are dangerous because of the possibility of exploding due to gas expansion contained within the wall. DON'T use double walled containers for this purpose. Plus, they are counteractive to the point of the thread - the double wall serves as an insulation purpose and you want to use fire to heat things up. Again, this is a big threat and danger and avoid using a double walled water bottle.
The second issue is BPA exposure. I am a university professor and my discipline is ecotoxicology. As a result of this I am aware of the potential threats related to BPA exposure and older nalgene/lexon type water bottles and food containers are an exposure route. This extends to coated food tins and potentially some SS bottles that use a liner in them. In my professional capacity, I would highlight that these human health concerns are largely related to chronic exposures rather than acute exposures. Chronic means long term daily exposure; acute means a short term high dose with a drastic biological effect. On the acute side of things, this could be a potential issue for infants and pregnant women where toxicological information indicates that these groups are most sensitive. For the general population, the linkage between BPA exposure and health effects, there is some endocrine disruption impacts and a growing body linking chronic BPA exposures to cancer albeit in the latter circumstance the jury is still out at what dose. From an exposure perspective, BPA is rapidly cleared from your body and does not bioaccumulate. That means, in order to illicit chronic effects you need to have continuous exposures. Chances are very good that a single exposure to an even higher dose like what you might experience by dissolving the BPA laden liner of tin in hot water is not going to have much effect unless you get into the habit of doing this on a daily basis or multiple times during the week. Still, we do have to be conscious that our exposure to BPA is somewhat continuous because it is so prevalent in packaged food stuffs as well as a major component of sewage effluents that can be recycled into our drinking water. Do I worry about BPA exposures personally? No, I don't and I don't fanatically avoid BPA containers. I haven't thrown out some of my older nalgenes and am not adverse to using them for drinking water. I also often buy canned tomatoes, pea soup, canned beans and the like because I'm too lazy to cook from fresh. Then again, I'm an old guy, married and who cares if my testicles shrink a little (other than JCAV and Kurupted who seem to be fascintated by endocrine disruption and how aligator penis's are smaller now than they used to be), after all its better then them getting to be the size of a bowling ball! So - the need to avoid BPA is at this stage a bit of a personal choice. It ain't going to kill you (at least this one time it won't) and it is far less inherently dangerous than the threat that MTWarden describes for double walled bottles blowing up and spewing boiling water and shrapnel into you. But, if you are worried about BPA you can easily circumvent the risk by selecting a BPA free SS bottle and avoiding making a billy from a lined tin (stick to coffee cans which are usually unlined). I find that many knockoff water bottles advertise this as advertisment of BPA freeness of a water bottle product is an in thing to do right now.
Cheers, and lets see some more pics of people boiling water in their water bottle!
Mistwalker
Gold Member
- Joined
- Dec 22, 2007
- Messages
- 19,037
Well, hmmm....I spent the money on my ss bottles for multiple reasons, and yes one was that they would also function to boil water in should the need arise, and I even picked up one of Marion's guyot bails just for that. But in all honesty it was primarily for the durability and that in an insulated case the water (usually starting out as ice water) stays cooler longer than in a plastic bottle. I don't know how important that is up there, maybe it isn't, but down here where we had a stretch of 35 straight days of over 100 degree heat indexes (with several of those between 111 and 114 degrees) and having to be out in the field working it is definitely a feature I didn't mind paying a little extra for 
I have a zebra billy and a new tatonka 1 liter I bought primarily for boiling things in, BUT, if you just really need to see it all sooted up to feel better about it I will try very hard to oblige on the next outing. 
I have a zebra billy and a new tatonka 1 liter I bought primarily for boiling things in, BUT, if you just really need to see it all sooted up to feel better about it I will try very hard to oblige on the next outing. - Joined
- Nov 6, 2008
- Messages
- 712
I have several ss bottles from walmart - they are single wall, unlined and cost $5. They typically have 2 styles - one has a bottom that is pressed in - this will likely fail if fired. The other has a smooth, rounded bottom and is much better for boiling. I have not used mine over open fire, but I have boiled in it several times with a pepsi can stove.
- Joined
- Feb 4, 2011
- Messages
- 1
I will have to get some pics up for the challenge. I'm new to the forum and this looks like fun.
xbxb
Basic Member
- Joined
- Jun 23, 2005
- Messages
- 1,618
After reading what all the posters are saying (and very informative I might add) I think I'm sticking with the ordinary can. The one without the lining. I make a handle by punching two holes on opposite sides of the can near the top rim and use a piece of wire which I bend through the holes.. I can boil water, cook etc. and when it gets dirty i just wipe it off with a rag or sand. I place all my kitchen items in it and stick in cotton sack. I think it works pretty good.
I am passing on this one
My 40 year old metal canteen sits in a canteen cup
This cup has made countless cups of tea, coffee and soup
And will continue for many more before I put my canteen in to a fire......
And I am a firm believer in Coffee cans for billy cans
Shows the kids they don't need fancy gear to get going
My 40 year old metal canteen sits in a canteen cup
This cup has made countless cups of tea, coffee and soup
And will continue for many more before I put my canteen in to a fire......
And I am a firm believer in Coffee cans for billy cans
Shows the kids they don't need fancy gear to get going
Mistwalker
Gold Member
- Joined
- Dec 22, 2007
- Messages
- 19,037
Hey, if canteen cups are admissible I just got a crusader kit sent by a friend in England I have been itching to play with
- Joined
- Sep 2, 2008
- Messages
- 7,702
I'm hoping to give this a go soon :thumbup: Good stuff guys.