Thermal bags: purpose and varieties

Those who often relax in nature are likely to face the difficulties of keeping food and drinks fresh. And in fact, the problem is unpleasant - nevertheless, it can be successfully solved. For all lovers of walks and hikes, a thermal bag will be a good help.

The thermal bag is a mobile container that maintains the optimal temperature regime in the inner compartment. This allows you to preserve the freshness, original appearance and taste of the contents.

The thermal carrier can maintain both high and cold temperatures. Within 3-4 hours the required result is achieved due to the presence of cassettes with water-salt solution or ice. For longer cooling, cold accumulators are used: they keep the temperature up to a day.

The thermal insulation characteristics of the materials used protect the contents of the box from external heat or cold. The design provides for double walls, and between them there is a thermal pad made of polyurethane foam or polyethylene foam. The top of the carrier is sheathed in nylon. The bags of the highest quality are additionally framed with waterproof and reflective fabrics.

Boxes with ice packs are presented in retail outlets in a wide range.Nevertheless, not all consumers understand how a thermal bag differs from a refrigerator bag. Despite the apparent similarity, the design and functionality of these devices differ.

A cooler bag is called a portable refrigerator in everyday life. It consists of several layers:

• outer cover - represented by an ordinary bag made of waterproof fabric;
• the inner thermal pad is a bag made of isolon or other foil-clad insulation, its shape completely repeats the base with its outlines.

Both carriers are made of materials with low thermal conductivity. However, there is a noticeable difference between them - a portable device is provided in the refrigerator that triggers forced cooling. The refrigerant is recharged from time to time, which extends the storage time of food many times over. This system is extremely cool.

The function of the thermal bag is to maintain the initial temperature of the food. It is based on the use of a passive mechanism that retains both cold and heat equally. Accordingly, in such a box you can carry both cold compote and hot coffee. This effect is achieved through the use of a thermal protective layer.

The main difference between the two is the effect. A thermal bag works in a similar way to a thermos: it does not heat or cool food. A portable refrigerator cools it down and maintains a stable low temperature in the box.

There are several main types of thermal transfers. They differ slightly in their functions, but they have design features.

The thermal carrier for the machine provides active cooling and heating options. However, their presence significantly reduces the possibility of maintaining the temperature regime. The system is activated by connecting it to the cigarette lighter.

The classic thermal carrier is a lightweight design, lightweight and easy to move. The possibility of passive cooling is provided here. The model is in great demand, so the stores have an impressive assortment of these bags in different sizes.

A separate type of such a thermal bag is considered to be a thermal container. This is a box with a special heat-insulating layer and dense casing, such a structure ensures reliable retention of cold. The model is optimal for short hikes and trips.

An irreplaceable thing for hiking and travel. It is a shoulder-type refrigerator. Depending on the model, the displacement varies from 16 to 25 liters. From the outside it looks like a simple backpack, but more roomy.

In fact, such a thermal bag can be compared to a mini-refrigerator, you can place lunches and snacks in it in order to take to work, give your child to school or for a walk.

The mobile foldable thermos bag will become a lifesaver during long trips and hikes. It is made of dense waterproof material. The design provides for a sealed gasket and a flexible plastic thermal insulation layer. The frame is made of aluminum.

A feature of the model is the presence of removable internal stiffening ribs. This allows you to maintain the necessary shape of the container, contributing to the preservation of food intact. Such a basket can easily accommodate products for a company of 3-5 people. After use, the empty carrier is folded up and placed in a backpack; when folded, it takes up very little space.

The thermal belt carrier is ideal for skiers and other winter sports enthusiasts.It is fixed to the belt with a carabiner-type fastener. The design provides the ability to adjust the length and fit it to the figure.

If you find it difficult to decide on the model of a thermal bag on your own, we suggest focusing on user reviews. We have compiled a small rating, which includes products from well-known brands. Their high quality ensures exceptional performance.

The 40L bag is a good alternative to bulky thermal containers. Mobility is assured by a pair of handles on the sides, with another on the roof. The weight of the bag is 3.5 kg, the size is 45x45x45 cm, the top layer is made of synthetics. The optimum temperature of the products is maintained throughout the day.

Ceramic container for 26 liters, is a high-quality sealed carrying. Thermal insulation is provided through the use of materials with low thermal conductivity, the body is made of high density polyethylene. The dimensions of the container are 32x50x33 cm.

Practical carrying case made of heavy-duty nylon. The inner part of the structure is assembled using a seamless technology, which completely eliminates the appearance of leaks. The useful volume of the bag is 6 liters, this capacity is quite enough for storing food for 3-4 people. The design includes adjustable straps for easy carrying.

The advantage of this design is its compactness and portability. The bag is spacious, the useful volume is 14 liters, the set includes a battery. The thermal box can hold the temperature for 4–5 hours without using refrigerants, and up to 1.5 days with refrigerant.

One of the market leaders in cold-cooling bags. The demand for models of this brand is due to the high quality of materials and exceptional performance. The weight of the thermal bag is a little more than 2 kg, its dimensions are 52x26x28 cm. The body is made of durable plastic.

When using ice packs, it keeps the temperature from 0 to 5 degrees for 48 hours.

The box holds up to 20 liters of food. In the upper part there are pockets for small items and a mobile phone. Carrying is carried out using an extended shoulder strap and an ergonomic handle attached to the lid.

When using thermal bags, you must take into account the basic requirements for these devices.

• Displacement. The volume of the bag must correspond to its contents - only in this case you will be able to use the carrier with the greatest efficiency and utility.
• The presence of cold accumulators. The use of refrigerants increases the heating period of products and liquids carried in the box several times. Without a battery, the temperature is maintained for 3-4 hours, the refrigerant increases this time to 1-2 days.

Insulated carriers are designed to maintain the initial temperature of the products carried in it. They are used by:

• on long trips;
• on picnics, while hiking, fishing;
• for storing baby food;
• on the beach;
• as a snack box during study / work.

To keep the product fresh for as long as possible, it is advisable to take a cold accumulator - it should be placed in the freezer 7-10 hours before use. After this time, the batteries are placed in blocks specially designated for them, they are located on the inside of the container (on the walls or on the lid). Their number depends on the amount of products carried:

• 1 PC. - for 4 liters;
• 2 pcs. - 6 liters;
• 2 pcs. - 12 liters;
• 4 things. - 24 liters;
• 6 pcs. - 36 liters;
• 8 pcs. - 48 liters.

Food and drinks are loaded into the bag in one go. It is advisable to do this as quickly as possible, otherwise, with any reopening, the heat transfer processes will be disrupted. To achieve the longest possible effect, the load in the carrier should be at least 65–70% of the total working volume of the containers.

In conclusion, here are some useful life hacks.

• To preserve the freshness of meat and sausages, it is advisable to wrap them in foil before placing them in a thermo bag.
• If you are going to dine outdoors with salad, you should not season it at home. Hide washed and dried vegetables with herbs in the carrier, and you can cut and fill them already during a snack in the dishes.
• Drinks are placed in the thermobox pre-cooled or hot.
• Do not leave your bag unnecessarily in direct sunlight or near heat sources.