Unfortunately, we don’t always find ourselves fully armed in nature. In some cases, you may not have basic equipment with you. It is not recommended to drink water from streams without disinfecting it.
There can be many reasons why you could find yourself without a bowler hat. But don’t despair; with some ingenuity, you can do without this useful device. The main thing is that there is fire. Below we will look at the most common methods of heating water in field conditions.
How to boil water over a fire using a plastic bottle
Do not throw away this utensil immediately after use. She can serve you at least once. No matter how strange it may seem, it is quite possible to boil water over a fire without a kettle in the field using an ordinary mineral water bottle. In the same way, you can get it on a hike.
To do this, you will need to pour it entirely. Please note that the bottle must be filled entirely, up to the edge of the neck. Next, it is carefully placed on the coals. The fire should not have an open flame at this point. It is advisable to place the bottle in the middle of the coals. This will speed up the heating. Monitor the process; once the water is hot enough, quickly remove it from the heat. Oddly enough, the bottle practically does not melt. This allows it to be used several times in this way.
You don’t have to wait for coals to form in the fire; you can heat the water in plastic bottle You can do it over an open fire. You just have to tinker a little with preparing the process. In this case, one third of the water is poured into the bottle. They tie her by the neck to the end of a stick. The other end of this stick is stuck into the ground. You need to make sure that the fire almost reaches the bottle. As soon as the water boils, remove the bottle from the fire.
Both of these methods are based on the difference in the melting temperature of plastic and the boiling point of water:
Water boils at 100°C;
Plastic melts at 200°C.
This way the water cools the bottle, preventing it from melting. This method is good if you find yourself without a pot by accident. For example, they lost it. But you had some liquid with you.
Boiling water with stones
It is likely that this is the oldest and easiest way to get hot water without a pot. To do this you will need several stones and any container. You can use anything to heat water. First, let's look at the options for preparing the container.
To heat water in this way, you can use anything, even dense plastic bag. You can also make some kind of analogue of a cauldron. A small hole is dug in the ground. It should be lined from the inside with waterproof material. A polyethylene raincoat, a piece of tarpaulin, and so on will do. Water is poured into the resulting container.
Then they select suitable stones. Various round stones like river pebbles are ideal. The size is selected depending on the volume of the resulting “dishes”. The stones should be washed and heated over a fire. Using two sticks they are placed in water. This is done one by one. One stone heats the water, the other is in the fire.
Usually a couple of stones are enough to bring a small volume of liquid to a boil. This way you can even cook dinner. If polyethylene was used for the base of a homemade cauldron, then do not allow the hot stone to come into contact with it.
Wooden dishes
When most people mention wooden utensils, they think of spoons. Well in as a last resort, hollowed out bowls. It is hardly possible to do this in the field. But anyone can easily organize a birch bark pot. With the right approach, it is quite possible to boil water in it and even.
To make it you will need birch bark. Young is best, but this is not important. And four short sticks. Birch bark is cut in the shape of a rectangle or square. Next, the corners are bent and secured using slightly split sticks. The result is a rectangular vessel.
It is not recommended to place such a pot on an open fire. This may damage it. Therefore, wait until coals form in the fire and only then place the dishes there. You can also dig a hole next to the burning fire and pour coals into it. A pot is placed on top.
Boiling water in a plastic bottle is not something out of the ordinary. Everything is very simple. And although such a need may not arise often, you need to know that if something happens, plastic can cope with boiling water no worse than a metal pot or pan.
Let us imagine the following as an example. In an extreme or emergency situation, for example if a person is lost in the forest, he runs out of drinking water, and for drinking collected from an unfamiliar source is doubtful. Since we planned to go out into the forest for a short time, we didn’t take a kettle with us; we only took a liter plastic bottle of mineral water with us.
In addition to the bottle, all that is needed to boil water is a knife, a cord or rope of about a meter, a lighter or two or three branches 1.5-2 cm thick. You can use laces tied together as a cord. If the shoes are without laces, then use a lanyard from your favorite folding knife, which unfurls into a cord of more than a meter.
We dig a small hole. In this case, it turned out to be about 20x20x5 cm in size. We install branches above it. We tie the cord to the bottle and one of the branches. We adjust the length of the cord so that there is about 10-12 cm from the bottom of the bottle to the surface of the firewood.
We light a fire and hang a plastic bottle over it. We maintain a stable fire so that the flames of the fire touch the bottom of the bottle. Don't forget to remove the plug. If a plastic bottle is not full, then during the boiling process it will inevitably become deformed and decrease in size until water takes up its entire volume.
Boiling water almost ends after a large number of bubbles appear rising from the bottom of the plastic bottle. Then we move it slightly to the side of the fire, at the same time add firewood and increase the burning intensity.
After some time, when the water has finally boiled, we remove the bottle from the fire. After boiling water in it, a plastic bottle remains intact and can be used further. With certain skills, the entire process of boiling 0.5 liters of water takes from 40 minutes to 1 hour.
When the boiling of water in the plastic bottle is completed, we disassemble the entire structure, and again turn the cord into a lanyard for a knife. An adjustable loop at the end of the lanyard adds convenience when using the knife. For example, when you need to hang it next to you on a twig or twig. A tightened loop that passes through the holes in the knife fixes and holds the lanyard in the upper suspended position so that it does not get under your hand when working and does not interfere.
This post will be useful to everyone who goes hiking, in the forest, in the mountains, on picnics, etc.
In it I will talk about a way to get boiling water for tea, coffee or porridge in the field. instant cooking, if you do not have with you a pot, a kettle, a saucepan, or even a mug in which to heat water.
All we need for this is fire and water.
The method is very simple and convenient; it was taught to us as part of a survival course during a special Combat Camera training.
2. When going on a short hike, we, as a rule, do not take a kettle, saucepan or kettle with us, without planning to boil water for tea. But sometimes it happens that either the hike drags on, or the weather suddenly worsens, or someone is not feeling well, or the situation simply turns in such a way that it is necessary to stop for a rest. No one ever refused tea at a rest stop, and sometimes it is absolutely necessary to warm up. What to do if you need boiling water, but there is nothing to heat the water?
In fact, there is something to heat it up. After all, we brought it with us in some way? As a rule, we take water with us in plastic bottles - they are both lightweight and practical.
Therefore, we will boil water... in a plastic bottle. 
3. Light the fire, completely fill the bottle of the required volume with water and carefully place it in the middle of the fire.
Moreover, in order to boil 0.5 liters of water, you need a very small fire; only a dozen small dry twigs will be enough. If you need to boil more water, it is better to do this in several passes than to use a larger bottle, because... the water in it will take much longer to boil and the bottle may become severely deformed 
4. That's it, leave the bottle of water on the fire and wait literally two to three minutes.
Don't worry, the bottle won't melt!!!
Why?
Let's turn to school course in physics. What is the boiling point of water? That's right - 100 degrees Celsius and not a degree more. Then it begins to evaporate. The melting point of PET plastic is 260 degrees, i.e. much higher. Being on fire with water inside, the plastic simply cannot heat up to the melting point. Water actually cools it down to 100 degrees.
Therefore, as long as there is water in the bottle, it will not melt and will perfectly serve as a teapot for you. 
5. Before the water boils, you need to remove the cap from the bottle (in principle, you don’t have to put it on from the very beginning). If you leave it, then unscrewing it, you can get seriously burned, because... boiling water will splash out due to high blood pressure in a bottle 
6. By the way, you can disinfect water using the same method if you completely ran out of drinking water during a hike and you had to collect it from an open source, the purity of which you doubt (it could even be a puddle on a forest path, but you need to collect water from it carefully , so as not to raise silt and dirt from the bottom).
This water should be kept on the fire in a boiling state for 5 minutes. 
Header photo(With) sergeydolya
, because I filmed the whole process with my camera
How to get a bottle of boiling water out of the fire?
Well, don’t get too carried away, it’s plastic after all..
UPD about the harm of plastic bottles.
Material from which plastic water containers are made: PET (polyethylene terephthalate or lavsan) - a polymer resistant to heat (melting point - 260) and to chemical influences active substances. Only strong alkalis (caustic soda or KOH) act on it. So critical negative impact no for water.
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> survival in peaceful life > methods of boiling water in camping conditions
Method of boiling water in camping conditions
It’s good if you have a metal container for boiling water, but if you don’t, what then? And then we remember how at school, during physics lessons, we wrapped a thread around a nail and burned it on an alcohol lamp, but the thread did not burn out. Why? Yes, because all the energy from the fire was transferred to the nail, and until the temperature of the nail is equal to the ignition temperature of the fabric, the thread will be intact.
The same is true here, the container will not burn out until the ignition temperature is equal to the boiling point of water. You can even boil an egg in a paper bag). Therefore, water can be boiled in almost anything that has a combustion temperature of more than 100 degrees. That is, plastic PVC bottles, plastic bags, paper bags, paper bags etc. Clarification - all this container really catches fire very easily, so you need to boil water in it over coals, pour water into the container and hang it over the coals, where the temperature is about 100 degrees, the main thing is that there is no strong open fire, or over the fire, but so, so that it is on the side and does not fall directly on the bottle or bag (for example, on the leeward side, when the wind blows the fire a little to the side) The water will boil slowly. Caution - PVC containers are chemically neutral only when cold; when PVC is heated, it may release chemical substances into the water, that is, at constant use Water boiled in this way can cause poisoning.
Also in emergency conditions You can boil water without containers; a cooking container can be replaced by a hole in a rock or stone. If you have a plastic bag or piece of film, you can boil water like this. Dig a hole of the required size in the ground and put a bag or piece of polyethylene into it, fill the hole halfway with water. The hole should be smaller than the bag, which will take the load off the film. The bottom of such a polyethylene pan should be lined with pebbles so that the stone heated on a fire does not burn through the film when immersed.
Stones heated over a fire and dropped into a container give off their heat to the water, gradually heating it to a boil. You can pull stones out of the fire using improvised wooden tongs made from two curved sticks or a wire loop. Wrap the stones tightly with wire and use them alternately while maintaining boiling water in our film saucepan. Don't worry, polyethylene will not melt from boiling water. The ignition temperature of PVC and polyethylene is almost 200 degrees.
An improvised saucepan can be made from birch bark by twisting a tube into a cone or from a large piece of birch bark, making a rectangular saucepan with fixed edges (as shown in the photo) Or this big piece Place the birch bark in a hole, as was said above in the example with the bag, pour in water and boil with hot stones. Boiled water This way will be to everything and environmentally friendly.
Similar topics:
1. Why do you need to boil water in the forest? Even if there is a spring nearby with you, then definitely name clean water, flowing in it is not allowed. In order not to risk it, it is better to boil such water. Since you initially did not plan that you would get lost in the forest, you did not take a pot or other utensils with you. But an ordinary plastic bottle was at your fingertips. In this case, that's almost all you need.2. All that remains is to find a source of water. This could be a spring or some other source that looks drinkable. If you went into the forest to pick mushrooms, then you probably had a knife with you. Also rummage through your backpack and find a rope or cord 1.5 - 2 meters long. Look there for matches or a lighter, and also find two branches a couple of centimeters thick nearby.
3. However, you can usually use the laces from your shoes tied together as a cord. If you don’t have laces at hand, then a lanyard from your favorite knife, which extends more than a meter, will come to your aid. So in this case, you can find an alternative solution.
4. So, you can begin this difficult task. First, find a flat area with loose soil so that you can dig a small hole in this place. It’s clear that you most likely won’t have any shovel at hand. Therefore, you can use improvised means, large sharp sticks, or, if the ground is completely loose, dig the desired funnel with your hands. The average size of such a hole should be about 20 centimeters in length, 25 centimeters in width and 5 centimeters in height.
5. Next, we install the branches in the form of a house, and then tie a string or ropes to the bottle and to one of the branches. Next, adjust the length of the cord so that it is from 12 to 15 centimeters from the bottom of the plastic bottle to the surface of the firewood. This is necessary so that when the fire is lit, it does not melt the bottle and you do not lose what is essentially your only vessel in the forest.
6. Prepare firewood and light a fire. Next, hang the bottle as indicated in the previous step. Try to maintain a steady fire. It should be of medium length and not reach the bottle so as not to melt it. When placing a bottle of water on the fire, do not forget to remove the cap, otherwise the bottle will simply burst and the water will spill onto the fire.
7. Carefully ensure that your bottle is almost completely filled with water. If the plastic vessel is not full, then during the boiling process it will constantly deform and shrink in size, and at one point it may simply burst. For this purpose, it is proposed to pour water into the bottle, leaving only 9/10 of it unfilled, so that when boiling it does not spill out of the vessel.
8. As soon as you see what starts to rise from the bottom of the bottle a large number of small bubbles, immediately move your plastic bottle away from the fire. At the same time, we do not forget to throw some wood into our fire and increase the intensity of the fire, so to speak, maintain its optimal “height”.
9. Well, that’s all, our water boiled, but the plastic bottle remained safe and sound, it can be used in the future for these purposes. When working according to this algorithm, the process of boiling your water will take on average from 45 minutes to 1 hour. All this for a 0.5 liter bottle. For a 1.5 liter plastic vessel, this process is slightly longer - about 1.5 hours.
10. Next, we slowly dismantle the entire structure we have installed. We return the lace to the lanyard of the knife. An adjustable loop at the end of our knife will add maximum convenience when using your favorite knife. For example, you can hang it next to you, on a tree branch or twig. The resulting loop, passing through the hole in the knife, will secure the lanyard and hold it in a suspended position. Then, when working, your favorite cutting object will not get under your hand and interfere with your work.
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