Survival Myth or Reality: Does Double Walled Water Bottle Explode in a Campfire??

[@pyrosmoak53]

You basically explained what I've always thought when hearing they explode. Thanks for going full Myth Buster for us with this one.

[@rickkephartactual7706]

Excellent myth buster that was long overdue.

[@4StonesHandcraft]

The double walled bottle in the fire is doing what it was designed to do very well, insulating the contents from the external temperature..

[@rammix1]

Not "from external" but from heat exchange.

[@4StonesHandcraft]

( : Yes! I was trying to think of the word but 71 y/o brain couldn’t find it haha.

[@dlighted8861]

Wow you actually picked up on that. 🤗😂😂😂🙄😂😂😂🤗

[@wootenbasset8631]

Great content. A bit verbose. Thanks nonetheless.

[@TomTurner704]

Double wall stainless thermoses make great windproof water boilers for small backpacking stoves. You just cut off the bottom of the outer shell and drill a bunch of holes around the neck of the outer shell. Make a little mount on top of the stove and they become impervious to the wind in boil water with very little fuel.

[@stoneysdead689]

That's an amazing hack- thank you.

[@rammix1]

Or, instead of destroying a useful item which has higher value undamaged, you could use other means of wind protection (and dozen times cheaper too).

[@stevenholland8167]

I like the "Mythbusters" version of your videos...great information for those who do not know.

[@thomasdemaio53]

​@@rammix1nah dude. It was a slick hack

[@dlighted8861]

Interesting.🤔

[@masamunesword]

Another issue with putting insulated bottles in a fire is that a lot of brands still use lead solder plugs in their construction which fire is not going to play nice with.

[@Eyes0penNoFear]

Don't breathe this!

[@AquaTech225]

@@Eyes0penNoFearwouldn’t be enough to hurt anyone

[@Eyes0penNoFear]

@@AquaTech225 Columbia University Irvine Medical Center: "Lead and Children: No Amount of Lead is Safe"

[@johnathon007]

@@Eyes0penNoFear That is for ingesting it. The amount of lead is so incredibly small in these bottles that it borders on nothing. Also a fire isn't going to get it hot enough to vaporize and even if it did you would have to breathe within inches to actually inhale any.

[@paulvoit5610]

Always heard they'd explode. Never heard they wouldn't boil water. Thank you so much for the expert information and the concise presentation.

[@dbbeck90]

If anyone was looking to use a double walled water bottle for its intended purpose, this inadvertently became a very effective Ozark Trail advertisement 😂

[@matfindil]

I own this same bottle, it's great for it's intended purpose.

[@jeremiahyeo5863]

This insulated water bottles makes for a good extra weight - it’s like carrying two water bottles but only one of them you’re going to use.

[@nomadmarauder-dw9re]

Get s G.I. 1qt and cup. Or a repro of the old school metal canteen. There's also a cup stove you can put over coals or even into a fire. Get the open stove, not the fancy one. It sux since you're heating the stove instead of the cup.

[@jeremiahyeo5863]

@@nomadmarauder-dw9re Absolutely. Those are totally legit. I love my old canteen cup. You just build a little fire underneath it and it’s perfect. No need to bring a stove, it already nests inside of a practical metal fire ring.

[@journeybrook9357]

But metal can act like a pot plastic can not

[@jeremiahyeo5863]

@@journeybrook9357 Yeah don’t go for the plastic canteens - they make them out of stainless steel.

[@OnlyTruthLove]

Or you have to carry double the wood and time to reheat your water. It all depends on your situation.

[@bobashmore6442]

A few years ago I was at TJ Maxx following my wife around and kind of bored. She went into the sale aisle and suddenly I wasn't bored anymore. Right in front of me was a shelf full of stainless steel water bottle. 32 ounce. I picked one up Abbey were all single walled. $5.99 each. My wife watched in amazement as I scooped up 10 of them and threw them in the cart. I put2 in swept my get home bags. The rest are still on a chain my garage. I have never seen them in TJ Maxx agai. No idea why they were there but... I am flush with water bottles.

[@joshuaritzheimer1382]

The double wall container would take a long time to cool down enough to drink after boiling too.

[@danielkutcher5704]

A water boiler such as a Kelly Kettle will boil water very quickly with twigs, pinecones, or dry grasses, but its not really designed to carry water, it only has a press-fit rubber plug in the spout. The two larger sizes work best, but they are very bulky. The stainless fire base makes a decent wood burning camp stove with the optional "hobo stove" there are other manufacturers out there to explore as well. For a single-walled water bottle, I made a foam cover from a closed-cell foam pad, which works pretty well, but prevents me from nesting the bottle in my titanium cup. I have to wait a couple of minutes for the metal to cool, or it will melt the foam and stick to it. Wood resin sticks, too, but can be sanded off quickly with sand, if available, which is usually the case at the water source.

[@PuskwaskaOutdoors]

Never had one of the early double wall coffee mugs that had the seam on the bottom of the cup? They’d take on a little bit of water into the air space over time and then if you set them on something hot like a wood stove or a camp stove they’d launch like a rocket…. That’s why double wall stainless is dangerous. And yes I’m speaking from personal experience on that one…. I remember it made quite the bang when it let go.

[@just-stuff419]

After putting it in the fire, it's probably no longer vacuum insulated. Most of them have a plug of some sort in the bottom, where they draw the vacuum on and then solder or seal it shut. So the heat would release that, releasing the vacuum, hence making it no longer vacuum insulated. But by nature of it having air trapped between the two bottle sections, there would always be some insulation value to it. Also the reason why it doesn't boil water very well in the fire.

[@thewatcher611]

Either way, it seemed to take quite a while to heat up, and we never saw it boil in the time we had.

[@Hector-vx5yc]

Hi Dan, I must say you are an awesome instructor. I love watching your channel when I get off work your instruction skills are outstanding. I really enjoyed watched some of your older videos!! Nicely done!!! Brother

[@candycorn9990]

I think the reason people think it will explode is because they're thinking of sealed containers that have water in them(soup can, etc). Liquids and gasses are very different when it comes to thermal expansion. Heat up anything, it will expand. If you double the volume of liquid in a sealed container, the container has to give but if you double the volume of gas in a container, you increase the pressure a little. Another simple way to put it is you can pressurize a gas, but in any practical sense, you can't pressurize a liquid. That's why hydraulics work

[@mannihh5274]

Nothing to do with hydraulics - if you boil a water-based liquid, every liter expands to 1,700 liters of steam =1,700-times barometric pressure. Doubling the volume of gas in a container doubles the pressure, I won't call that 'a little'.

[@ColonelSandersLite]

@@mannihh5274Still, there's nothing in here that can explode. The insulator in an insulated water bottle is vacuum. The thermal expansion of air going from 0c to 100c is about 136%. That's the limit here. Ice water to boiling water. Multiplying nothing by 1.36 is less than 1atm. Ok... It's not a perfect vacuum because that would be too expensive to make... Multiplying 0.25atm by 1.36 is *still* less than 1atm. What's more likely to happen is for the solder plug to melt and get sucked up into the vacuum chamber.

[@lifeafterjess8872]

I love carrying a 500ml stainless thermos backpacking. Little luxury but for warm coffee all morning or one cold drink on a hot day it can really boost morale.

[@anymal544]

I believe people are confusing the Kelley kettle with a double wall thermos. I have heard of people plugging the water side of a kelly, which will cause pressure to build as the temp rises over 212 degrees. Just like a pressure cooker, it wont boil until the can ruptures, then a few cubic centimeters of water will turn into many cubic meters of steam almost instantly . Causing a terrible explosion. The air between the walls doesn't expand far enough or fast enough to cause so much damage. As always, great show Dan. Thanks

[@DanielSmith-yu9wq]

Good point.

[@mikehenthorn1778]

as i work on boilers a fun fact is steam expands to 1,600 times its volume when released from pressure.

[@thewatcher611]

If it is a closed system, increased pressure will increase the boiling point.

[@Larryw-o2k]

Every vehicle going has a pressurized water system its done to raise the boiling temp of water from 212 to ? Ib of pressure 2 degrees higher for boiling temp its why radiators explode when the cap goes bad sometimes to much pressure or to little water to much steam pressure up.boom metal fatigue

[@ssippisoaps8982]

I have a couple of double wall insulated stainless steel coffee mugs with a carabiner handle. I am going to drill a few holes in the bottom of one and also put a few holes on the sides to see if that vents it enough to be usable over open flame. If not, I can still use it for my morning coffee.

[@Georgecobb-s1v]

After hearing lots of rumors, I appreciate the clarification!

[@briansherret5268]

I think that the insulated container looks cool now that it has some color to it

[@nanaki-seto]

Yeh unfortunately heat coloring like that does not last long and wares away pretty fast

[@annpeet4334]

Makes a lot of sense. Insulation works both ways!

[@devildog17013]

I have been told, but never personally verified, that if you poke a small hole in the outer wall (with, say, an awl or other pointed object), it will reduce the insulation property to almost zero. This will then allow you to boil water more quickly, although not as quickly as a single-walled container. It is something I have never verified, but was wondering if you might be interested in giving it a go.

[@AJoe-ze6go]

VERY good video - glad someone finally cleared this up. I can only give this a 'thumbs up' once, but ... +10!

[@wren7195]

Random, but I bought one to use as a crucible for melting low-temp metals like alumiuminum in the fireurnaceorge and they jokes aside work quite well. You also get two for one if you just cut their rims off with a grinder or dremel-cutter. Successfully melted over dozens of cans into pucks with one half, and they're cheap enough to just toss if you can't get the slag out.

[@mchagnon7]

Even if it doesn't explode, the whole point of a double walled container is to insulate the contents. If you're heating water, you would want it not insulated. Also with no air gap, the single wall holds more water in a smaller space.

[@thethan302]

another thing, if you get the water boiling, the insulated bottle will keep it from cooling down, making it take much longer for your water to get down to safe temperature.

[@intellectualiconoclasm3264]

You can drill a vent/fill hole in the top of the double-wall. A some water in the bottom will generate lots of steam to boil the water. Theoretically, with less needed fuel. And it has a vent so no boom.

[@adrockey]

Great video!!! so there’s another reason not to use insulated water bottles. After the army I was in college and used a old-school Stanley coffee thermos. Now this was not fire related, but dishwasher related. So I was young and I washed my Stanley thermos in the dishwasher, the seam separated. So one day when I was pouring my coffee and tasted like rust. So it’s possible for water to escape into the vacuum, sealed part and turned to rust and become a health hazard.

[@jonathanbennison9220]

5:11 At the expense of multi purpose function, versatility One benefit from the insulated double wall container,assuming one has a single walled vessel... Perhaps the nesting cup or the bush pot. Boil in one, store into the insulated. A small benefit, to be able to keep hot water hot longer, perhaps. But, if you use that morning campfire, and prepare some hot broth to enjoy midday midhike when you might Not have a fire.... As one example.

[@traviswebb5094]

It more then likely started with Stanley. They are glass lined and I could see that. Just not outward.

[@AndreFavron]

I love LOGIC and Truth. Great vid M8

[@shabadu5]

Apparently it's common for those vacuum insulated bottles to be sealed with a lead plug. I haven't melted lead but I bet that seal would be compromised before the water inside boiled. Depending on the design it may still be safe from lead contact at that point but the vacuum insulation would be ruined.

[@MrDmadness]

Tin, not lead. lead cannot be present anywhere in anything sold for food use in North America

[@Eyes0penNoFear]

​@@MrDmadnessa quick Google search shows Stanley cups and many other brands use a lead plug in the bottom. Kinda mind blowing

[@lindapotter5750]

Thank you, i had bought. a really good insulated bottle. I heard on one of you tubes many sites that test gear. I paid even more for a single wall bottle to replace it. I wanted a bottle to put my clean water into to store and keep cool. Thanks, I just saved about $50 dollars...

[@derrickboatman1560]

If you put the lid back on an aluminum beer bottle and toss it in the fire it's pretty cool learned that one on accident

[@greyscout01]

Thanks for blowing up the myth.

[@skids62]

I used two 1L double walled bottles last winter on a -15°c/5°f trip to keep my water from freezing. Worked well. I use two single wall titanium bottles the rest of the year.

[@mikerandle5713]

Thanks, Dan. You explained this scientifìcally.

[@jakubpawlowski396]

A few cuts with your multitool to the bottom edge and a few holes to the upper part of the first layer and you have a jet boiler... i don't know why people have trouble boiling water in those :)

[@Ninjaknight81]

If all you have is a double wall container the best way I found to heat up the water is to get bailing wire put it through a large nut heat up the nut and put it in the water let it cool off and repeat it takes a while but it works ideally you have more than one nut your heating one up while heating up the water

[@seanpolus4873]

Great video! I got one! Is wool warmer than down or synthetic.

[@memathews]

Nice idea! And determine what their equivalence is by weight or thickness..

[@BrosephRussell]

What a great test ! The double wall was doing its job for sure, but it was definitely getting up there in temp. i wondered how much longer in the fire it would have boiled. It's definitely hot enough for some tea

[@coradavenport9142]

Thanks for clearing this up.

[@ArkCity]

WOW!! Such explosive results!

[@CaptainAiryca]

I have never liked insulated water bottles because they're so heavy, until I learned in hot weather or the desert having ice water is amazing!! I bring a metal pot for survival reasons if I bring my hydroflask on an adventure. Interesting video, I liked the expirement!

[@Giles69]

I’ve never thought that an double walled bottle would explode, but the air between the walls has to go somewhere when it expands and as you said it’ll pop a seal to escape… surely then the bottle is knackered and rendered useless as an insulated bottle 🤷🏼‍♂️

[@arasin.staubly]

On the plus side, this shows that the one you chose does seem to have pretty darn good insulation! .....but that just means you have to use it for exactly its proper purpose.

[@familytablet2577]

IMPORTANT: Not necessarily a myth, but one of THE most important thing to be discussed is the mylar blankets. For beginners and most of the time for advanced survivalist as well. To me, this one of the most misunderstood products. And yet it's in everyone's bags. Every time I talk to someone who's just getting into survivalism, they talk about having bought their space blankets. OK great. But most don't realise that these things can either save you or kill you. Most don't understand that the fact they don't breathe, it can make you sweat and thus negate the situation. Most don't realize that if you put it on like a blanket (touches your skin), it becomes conductive of the cold ambient air. There needs to be a serious and lengthy discussion on how to use it, and under which scenarios. And when to use it. Where to use it. There are plenty of myths associated with this product. People somehow think this will generate some heat. Not realizing that if you are cold to start with, it can only use your own body heat. As long as it doesn't touch your body. Anyway, you get the point.

[@lindapotter5750]

I have ins

[@Flashahol]

Best insulated bottle torture test ever! I never thought it would take it this well and still keep water cold for so long IN the fire but exploding? If anything there may be a vacuum or some low-pressure gas inside and that would be a big brand bottle $$$.

[@FishersOutdoorAdventures]

I have a double well cup that I drilled four little holes in the bottom of the outside wall only. And I’ve melted Vaseline in this cup in order to put the round cotton pads in there and making fire starters out of them. No problem and the Vaseline melted very quickly.

[@dirkhabermann8362]

Great video. Please more of this.👍 So many fancy idieas out there😱 Looking forward 😁 stay in the woods 🌲🌲

[@quinntheeskimooutdoors6234]

Thanks for sharing Dan. 😊

[@wayneeddy3261]

I drilled a couple of small holes in the collar & it will take a good 15-20 minutes to get water boiling...👍🏻 Those Ozark Trail bottles keep hot liquids hot longer than any other brand..👍🏻

[@i_am_a_freespirit]

Thank you.

[@olegoathiking1962]

You are a hoot to watch! Great stuff, fun, and informative too.

[@daveh7720]

Another concern I'd have about putting a double-wall bottle in the fire is the outer wall may be damaged. Like putting an empty pan on a fire, there's nothing to draw excess heat away from the metal and a hot enough fire could cause it to warp or even melt. When boiling water in a single-wall container the metal never gets much above 212° F.

[@nanaki-seto]

I seen those double walled ones pop off pretty good esp the ones with the bottoms like that. The bottoms love to blow off them as they are not welded but soldered. Not dangerous by any means but will make you jump a bit when one jumps 5 feet LOL

[@edubs9828]

In theory if you used a double wall and were able to consistently get 150ish degrees, that's an excellent temp to make some teas with. Like if you keep the double wall in the fire, and decide you want more tea, it's ready to pour for another cup.

[@jasongarling20]

Great video. Let's do wind screen/ fire reflection.. and the differences.... and windscreen with mylar becomes flammable. I mean becomes a fire reflector, like in super shelter... and in against wind screen.. etc

[@TheSaneHatter]

I have a double walled steel bottle, for what it’s worth, but that’s because I pair it with a Camelback bladder, and use it differently: the bladder holds plain old water, and the bottle is for anything I want to keep either chilled or heated, like Gatorade or tea. If I want to boil something, I won’t use the bottle, but the steel cup that I have sitting around its base, so *that* problem is solved.

[@petezahrbock]

Awesome video 📷 Dan!! Keep up the good work 👍

[@tomconway8881]

Good video as always.

[@Shmity1962]

When my single wall gets smashed or dented I put about an inch of water in it and screw the cap on tight and set it in the fire with a string tied to it. It expands back out and I pull it out to cool, good as new. Do a video of that

[@davidfunvideos]

This one might be possible to test but it would take some work. I was told by a camp counselor that if you are lost in the woods drag a long tree branch behind you that it will Prevent you from walking around in circles. I think the theory is that the branch would stop you from making to much of a curve. He only said a long branch. I would think that it would need to be at lest 10 feet. I think this could be tested with some tenderfoots and some GPS trackers. Give them a phone put it in an envelope an experience person might have other ways to determine directions.

[@vossierebel]

Hahahaaaa... show us a tin of baked beans in the fire... FUN!!😁😁

[@dcongdon2294]

What do you mean?

[@craigshugg2332]

@@dcongdon2294 The best way to find out is through experience.

[@clintonroushff7068]

Now that video would draw the viwes!

[@bkay1067]

Try spaghettios, a 80mm pop , Lil orange rings everywhere 😮

[@OverlandOne]

That would scatter beans all over the place...dont ask me how I know.

[@kevola5739]

I always assumed the insulation would melt or settle when heated and then no longer function as a insulated bottle effectively.

[@gregcrowe8885]

Thank You

[@ANoss13]

Bushcraft mythbusters!!!! Love it haha

[@raysheppard8040]

Piqued my interest, I did wonder why no good had not heard of the exploding myth. Now, if survival, I need kept hot or cold double wall excellent not so good boiling for sanitation

[@richh5824]

Fun video Dan!

[@jonathanbennison9220]

Great video.

[@chrisrobbins3038]

Can you do a video about all your tools you sell. What all their uses are

[@td6199]

If you heated rocks in the fire and put them in each container with the same amount and temperature of water would one boil quicker than the other? The insulated bottle may hold more the heat in the water bringing it to a boil quicker. IDK.

[@TheDarkSkorpion]

It may be like the exploding office chairs (google it, there's a terrifying video). Won't happen with properly made chairs, but if the manufacturer cuts corners and uses a wrong gas in the gas ram, it explodes if you plop into the chair, rapidly compressing the gas. Maybe if some manufacturer doesn't vacuum and just seals the vessel, not with dry nitrogen but regular air, it would be possible, although unlikely, that the moisture in the air could cause enough steam pressure to cause catastrophic failure. Perhaps even if the vacuum seal fails, and it pulls moisture into it, rapid heating may cause steam to build up faster than it can be released, eventually culminating in a boom. Again, with properly made vacuum flasks, this would be impossible, or at the least, extremely unlikely.

[@craigshugg2332]

Excellent videos see to many bushcraft and so-called KZbin survival experts saying that.

[@johnricks7277]

I do believe that you can drill a hole in the outer layer and release the air in them they work faster.

[@stevestumpy6873]

You can boil in one and carry or store in the other.

[@mannihh5274]

I wonder, why so many people don't have any clue of physics, isn't it a school subject any more? Thanks for explaining some of it ('unlike a grenade, the bottle is not designed to explode and produce shrapnel'), although you missed the most important point. @4:07 you talk about "the air between the outside and inside wall" - there is no air between the two walls, but a high vacuum! The higher the vacuum, the better insulation properties the bottle has. If there was air at athmospheric pressure inside, there would be a lot of conduction going on and the insulation be rather poor. But with a vacuum between the walls there's (almost) no conduction and the shiny walls reflect most of the radiant heat. It can't explode, because there is nothing inside to expand when heated. I'm quite sure, the seams will hold on pretty well, nowadays they use to laser-weld it, but there still is a weak point: a single hole, where the bottle is evacuated through. Quite often they are soft-soldered shut to seal the vacuum - in a hot campfire the solder can melt and allow air to get between the two walls, destroying the insulating value and speeding up boil time on the next attempt.

[@putteslaintxtbks5166]

I would use caution with putting any "insulated" waterbottle in a fire. If they are insulated with other then a semi vacuum, the could have something like polystyrene or some other very flamable insulation that could cause a build up of pressure and very flammable, poisonous fumes. It is possible something like that could blow up, sending it at high speed through the air, with jagged edges. If anyone saw someone put an aerosol can in a fire - very dangerous!

[@Greg_M1]

Good to know. Thanks.

[@JJoker69]

Is there any sort of coating on the aluminum or metal drinking bottles?

[@pierrehenri2297]

Good to know!

[@KevinsCampingAdventure]

I heard the double installed container boom from another KZbinr. Great video. ✌️

[@kriskahn7249]

Can the insulated canister build condensation between the layers in varying temps? If it does could cause a pop or split not bomb still

[@DanielSmith-yu9wq]

Not if the seal is good.

[@toma7652]

Would drilling a small hole in the outer layer help it boil faster?

[@Fercough]

Marginally yes. Too many variable factors for a definitive answe. A series of 5mm (no few what that is in inches) towards the base and another towards the top would definitely improve boiling times. However, the bottle would lose some of it's insulation properties. Buy a single wall and save the hassle.

[@freddyoutdoors]

Ace watch enjoyed watching on camp chill out with a coffee

[@danielfegley2735]

The only 2 mith I hear that bugs the hell out of me is cotton kills and you must have titanium cook wear and titanium garden trowel to dig a cat hole I prefer a cheap trowel you can pick up at any hardware store it comes with a handle I'm guessing it sold separately for the titanium one

[@Hemp1972]

Cool. I was wondering about that. 🔆

[@ColonelSandersLite]

The thing about this myth is that There's nothing here that *can* explode. At all. The insulator is vacuum. Let's suppose there's some degree of trace air though. There is. It would be expensive to remove all of it and good enough is good enough. In order to even possibly explode the trace air in the vacuum chamber has to be heated to the point that it would exceed atmospheric pressure. We'll just call that 1atm. The thermal expansion of air going from 0c to 100c is about 136%. That's the limit here. Ice water to boiling water. The vacuum would have to be pretty dang shoddy to even begin to take on pressure exceeding 1 atmosphere. It's not even possible for the starting vacuum to be that bad because of how these are made. What's far more likely to happen is for the plug in the bottom to melt and get sucked into the bottle. Might make a loud noise but that's about it. At least with a quality bottle. I suppose there are probably some extremely cheap ones out there that are just double walled with regular air in between. Still pretty unlikely to explode though.

[@pawesedrowski6743]

Is there actually air between the walls of the insulated bottle? I always thought that there's vacuum and it's the huge difference of temperature between the walls that creates a great pressure in the metal itself as one wall is axpanding more than the other and that's what may cause the bottle to damage. And... yeah... damage, not explode.

[@justinw1765]

In a vacuum insulated bottle there is very little of any air between the walls. Literally talking just some stray air molecules here and there. (If it was done right). It is just the metal expanding at different rates in different areas, which can damage the weld seam and/or the plugged air vent hole. If there was air in between and no weak point of a seam, then it could pressurize and semi explode (more like pop). That is because the trapped air inside would start to expand as it gets hotter. Probably not enough air and pressure to really explode it to any significant degree.

[@damimcute1]

Hey Dan. How about exploding rocks from the river or creek bed? I've used em, seen them crack. Never "explode".

[@DanielSmith-yu9wq]

I've had rock send pieces flying through the air. They don't necessarily have to be from the river.

[@jarvisskooge8602]

Wait, wait, wait… I just filled & capped my insulated bottle with gasoline & put it in the campfire… you’re saying it’s safe? 😂

[@prasaite]

Yes it willbe safe, vacuum between walls is a perfect thermoisolator so you need realy long time to boil your gasoline inside that bottle.

[@gilbeck1972]

Cole.......where did you get that hand grenade??

[@dcongdon2294]

General Joey biden caught that in the air back in WW1.He snuffed it out.Thats how he won the MEDAL OF HONOR the first time.

[@journeybrook9357]

New style ( material clothing catches fire or melts near fire. Than cotton twill or wool or old fannels . Had a debate recently. For I carry a wool blanket to place over my sleeping bag for more than one reason. New tent materials/ rainproof catches fire easy. Sleeping bags can burn or melt. Debate.

[@FredFreiberger-pk6wc]

I think we should carry insulated bottles you can put hot stuff in it to enjoy later greeze meat and put it in the bottle to prepare in camp later

[@daveburklund2295]

Singled walled are also lighter and take up less space

[@ranger178]

i would guess that a vacuum thermos is not going to explode if it is actually a vacuum there is nothing to expand maybe if you put some water in bottle and screw lid on tight you can get boiling water to blow lid off.

[@fyredyver]

I carry a single wall to boil in and a double wall to insulate and keep my heated water warm.

[@davidmulligan7894]

Do wet rocks around a campfire or rocks taking from a Riverbend explode