Free 35 Survival Hacks you'll love!

You will get 35 easy-to-implement survival hacks so that you don't have to stand aimlessly in the forest from tomorrow when things get tough. Take your skills to the next level!


Cooking without fire [Chemistry makes it possible]

With BaroCook you can cook without electricity, gas and fire Your food gets hot and you can cook. How it works, you will learn in the article.

from Martin Gebhardt | Bushcraft | no comment yet | reading time 5 Min
Updated on 13 June 2024 36.132 views 100% found this guide helpful
Cooking without fire [Chemistry makes it possible]

Martin Gebhardt

From Martin Gebhardt. Check out my โ€œAbout meโ€ page.

๐Ÿ‘‰ The key facts from this guide

  • BaroCook allows for cooking without electricity, gas, or fire through a chemical reaction triggered by a heat pad.
  • The heat pad contains calcium oxide, which is converted to calcium hydroxide upon contact with water, generating heat in the process.
  • The BaroCook system consists of a plastic container with lid, a stainless steel bowl, and a heat pad. A neoprene sleeve is also included to keep food warm for longer.
  • Cooking times vary depending on the type of food, with water for tea or coffee able to be heated in less than 10 minutes, while frozen foods require roughly 25 minutes.
  • The advantages of BaroCook include avoiding fire hazards, being able to cook while traveling, and the warmth it provides in winter.
  • The disadvantages are the limited amount of food that can be cooked and the relatively high price.

Let's assume that you have no possibility whatsoever to start a fire (e.g., during high forest fire danger).

Even then, there are still good ways to keep your food warm and cook it.

And now you will learn how it works in the article.

Chemistry makes it possible

If you don't have access to a gas stove or electricity, you have to find other ways to be able to cook.

Of course, you can simply light a fire, whether it's the classic way with a Firesteel or the exciting way with a battery.

But even the fire can go out on you, or it may not be possible to start a fire.

With the BaroCook system, you can cook without electricity, gas, or fire.

The set consists of a plastic container with a lid, into which a stainless-steel bowl is placed. A heating pad is placed under the stainless-steel bowl. Today, we will take a closer look at this.

With the first set you can start cooking immediately
With the first set you can start cooking immediately

Additionally, a neoprene sleeve is included in the delivery. You use this to keep everything warm even longer. For example, the set does not cool down as quickly in sub-zero temperatures.

Application and Chemical Reaction

The application is very simple:

  1. First, you need to remove the heating pad from the packaging
  2. Then you place it on the bottom of the plastic container
  3. Thereafter, you pour water over it

Attention, you must not tear open the heating pad.

Now there is a chemical reaction.

But why is that? What mysterious thing is inside?

Answer: The pillow is filled with calcium oxide (burnt lime).

And when calcium oxide comes into contact with water, it is converted into calcium hydroxide.

During this chemical process, heat is also generated. More precisely, temperatures in the range of 95 ยฐC to 100 ยฐC.

How will your food now be warmed up?

  1. Afterward, place the stainless-steel bowl inside
  2. Then fill your food into the stainless-steel bowl
  3. Close the box and put it into the neoprene cover

Well packed, you also have the option to store them in your backpack during the cooking process. Then it's just a matter of waiting.

The waste product that remains, namely calcium hydroxide, is biodegradable. So, you won't have any problems if you need to dispose of it in nature. Alternatively, you can dispose of it in household waste at the end of your trip.

Cooking Time

According to information, the manufacturer BaroCook's box can be used to prepare the following:

  • Water for tea, coffee, or soup in under 10 minutes
  • Various ready meals take around 15 minutes
  • Pasta, rice, and vegetables take about 20 minutes
  • Frozen products require around 25 minutes to cook through

Advantages of using a heating pad

The benefits of such a heating pad are clear.

  • Firstly, there is no risk of fire from an open flame. This is particularly advantageous when traveling in extremely dry areas or in regions where starting an open fire is simply prohibited.
  • Secondly, you have the opportunity to cook your food while on the go. This allows you to continue your journey more quickly if you are just passing through and have not yet reached your destination.

Simply prepare your food and pack the box, of course well packaged and appropriately secured, in your backpack. But be careful, as high temperatures can occur.

Even on your tour in the particularly icy winter, such a cooking method is advantageous. While your food is cooking, you can also simply hold the hot to warm box in your hand to warm yourself up.

In winter, you warm yourself with the warm container
In winter, you warm yourself with the warm container

Dimensions: With its small pack size of 25.8 x 24.8 x 13.3 centimeters (depending on the model), the box fits into any backpack. Therefore, it is also ideal for a small emergency backpack. It is also convenient to simply put it in (slightly larger) pockets.

The stainless steel is highly heat-conductive and hygienic and food-safe on the inside. Cleaning the product is also easy.

If you actually pack the box in your backpack, you don't have to worry. The folding clasps and the airtight silicone ring ensure that the box is packed and stored airtight and leak-proof.

The system with a heating pad has been used by soldiers and survivalists for some time and is well received. Compared to an open fire, it is relatively safe to handle.


However, with the box you are not able to provide for yourself and your child, yourself and your companion, or even yourself and your entire family.

The volume of the smallest stainless-steel bowl measures 320 milliliters. This allows you to boil water for a maximum of two people, but lunch is only enough for one person.

Therefore, the small box from BaroCook is more suitable for solo tours. However, there are other models with a capacity of 850 ml, 900 ml, and 1,200 ml. Here, there are sometimes differences in shape, not just in size.

BaroCook even offers a thermo-pressure cooker for the system with heat pads. With the wide range of products, you will surely find exactly what you need.

Pricing at BaroCook

The prices for the beginner sets start at around $30-40-

Barocook Rectangular Flameless Cookware System, 28-Ounce



Data updated 19 hours ago

Barocook Rectangular Flameless Cookware System, 28-Ounce

  • Available in four different sizes: Small 10 oz, Medium 28 oz, Large 33 oz, X-Large 40 oz
  • Includes stainless steel inner container, plastic outer container, silicone lid and a 50g heat pack
  • Flameless, water-activated, heating packs achieves heat up to 203 Fahrenheit
  • Heating packs can be disposed of like other environmentally friendly trash, Non-Toxic Flameless heat source made of Quick Lime
  • Flameless heating packs can be purchased individually or in packs of 10

List Price: $34.99

View Product

12 pieces of replacement heat pads cost about $15. You can also find all products on the official website of the manufacturer.

Here you can find the heat pads individually:

MRE Flameless Heater (Case of 12) โ€“ Lightweight, Compact Instant Heat Packs - Survival Flameless Food Warmer Kit for Camping & Hiking โ€“ Perfect Flameless Ration Heater for Outdoor Enthusiasts

Data updated 19 hours ago

MRE Flameless Heater (Case of 12) โ€“ Lightweight, Compact Instant Heat Packs - Survival Flameless Food Warmer Kit for Camping & Hiking โ€“ Perfect Flameless Ration Heater for Outdoor Enthusiasts

  • ๐‘๐ž๐ฏ๐จ๐ฅ๐ฎ๐ญ๐ข๐จ๐ง๐ข๐ฌ๐ž ๐Œ๐ž๐š๐ฅ๐ญ๐ข๐ฆ๐ž ๐€๐ง๐ฒ๐ฐ๐ก๐ž๐ซ๐ž: By using our MRE heater pack, safely and swiftly heat your MRE pouches without the need for fire, stove, or fuel. The flameless heater packs for food are designed specifically to be used with your MREs to heat them anywhere, anytime.
  • ๐๐จ๐ซ๐ญ๐š๐›๐ฅ๐ž ๐š๐ง๐ ๐‹๐ข๐ ๐ก๐ญ๐ฐ๐ž๐ข๐ ๐ก๐ญ ๐ƒ๐ž๐ฌ๐ข๐ ๐ง: Tailored for the adventurous spirit, our compact and easily portable flameless heater for food solutions is the perfect match for camping, hiking, and all outdoor escapades. The ration MRE flameless heater is the essential companion for any excursion into the wild.
  • ๐๐ซ๐ž๐ฆ๐ข๐ฎ๐ฆ ๐…๐จ๐จ๐-๐†๐ซ๐š๐๐ž ๐‚๐จ๐ฆ๐ฉ๐จ๐ฌ๐ข๐ญ๐ข๐จ๐ง: These food warmer packs are crafted with iron, magnesium, salt, and water for safe and efficient heating. Our MRE rations flameless heaters ensure the quality and safety of your meals with this reliable combination.
  • ๐’๐š๐Ÿ๐ž ๐ƒ๐ข๐ฌ๐ฉ๐จ๐ฌ๐š๐ฅ ๐š๐ง๐ ๐”๐ฌ๐š๐ ๐ž: Used MRE military food flameless heaters can be disposed of in the trash. The one-time-use flameless heating system does not emit carbon monoxide but may trigger CO detectors. Always use in a well-ventilated area on a heat-safe surface.
  • ๐„๐š๐ฌ๐ฒ-๐ญ๐จ-๐”๐ฌ๐ž: Just add water to the army food ration flameless heater and insert the sealed pouch of food into the bag, and in 10-12 minutes, enjoy a 100+ degree meal. Save time and effort with these rapid heating pads disposable accessories, perfect for busy schedules and emergencies.


View Product


Unfortunately, BaroCook is expensive for cooking or keeping food warm.

However, you have a secure tool at your disposal, with which you don't even have to leave your sleeping bag in the morning to heat your breakfast.

If the prices are too high for you, but you like the idea, you can get here a guide from me. In this guide, I will show you how to make the heat packs yourself.

Or you can use other alternatives that I have included in the guide "How to cook when the forest fire level is too high? - Your guide to cooking without a campfire".

Until then, I look forward to your feedback. So feel free to leave a comment here.

Have you already heard of the heat pads?

Maybe you have already tested it yourself? You are welcome to share your experiences.

Take care, Martin
Martin Gebhardt

Author of the guide

Martin Gebhardt

Hey, I'm Martin. On my blog, you will learn the basics and numerous details about living in the wild. I think survival, bushcraft and the good life in nature are the keys to happiness. Find me here on Instagram or on YouTube. You can find more about my mission on the About Me page.

Was this guide helpful?

8 people found this guide helpful.


5.00 out of 5 points (8 Ratings)

Comments (0)

This post may contain affiliate links. So if you click on the links and make a purchase, I will receive a small commission at no additional cost to you. Click here, to learn more about it.

Free 35 Survival Hacks you'll love!

You will get 35 easy-to-implement survival hacks so that you don't have to stand aimlessly in the forest from tomorrow when things get tough. Take your skills to the next level!