A camping refrigerator is a useful thing that lovers of outdoor recreation, tourists, car travelers are trying to get. The cooler bag works on the principle of a thermos - both drinks and food in it are kept cold for quite a long time.
A cooler bag is essentially a simple carry-on bag with a layer of insulation inside. For those who would like to purchase such a thing, but stop because of its considerable price, you can try to make a travel refrigerator yourself.
Making a cooler bag with your own hands
To make a camping refrigerator, you need an unnecessary bag and a piece of insulation. For example, foamed polyethylene is perfect - white insulation, in which one side is covered with a layer of foil. It is not difficult to buy it at any of the hardware stores.
It takes very little time to transform a regular bag into a refrigerator. It is necessary to cut out the inner lining from the insulation - it will turn out like a cross, in which the rays should coincide in size with the walls of the bag, and the place of their crosshairs should correspond in size to the bottom. One of the rays will be longer than the opposite - this is for the cover. The foil layer of insulation should be facing the master.
When cutting out the insulation, it must be borne in mind that after the structure is glued, it should be inserted into the bag without difficulty. Therefore, it is better to make the pattern 5-7 cm smaller than the size of the bag. The sides are fastened with tape. They must be carefully and neatly secured both from the outside and from the inside. There is no need to regret the adhesive tape - the safety of the products depends on how well the gluing is performed. If the walls of the structure do not adhere to each other as firmly as possible, you should not count on the thermal effect.
How to make "cold accumulators"
In order for the cooler bag to function properly, you will need to make cold accumulators for it. From what you can find at home, small plastic bottles are perfect. Each of them must be filled with a concentrated salt solution. To prepare a solution, six tablespoons should be taken for one liter of salt water. The finished solution is bottled and everything is frozen in the freezer.
For better preservation, each of the products can be wrapped in paper or newspaper. Everything should lie inside as tightly as possible. It is better not to open the cooler bag, in which the food has already been packed, unless absolutely necessary - this way the cold is better preserved. There are many other ways to increase thermal insulation.
