How to choose a thermos with heating?

A thermos with the possibility of heating will be a great purchase for those who do not have time to wait until the water in the kettle heats up. You can purchase a miniature version in the car or a larger model for the office. It is worth considering the features of electric models, the nuances of choice and which models are the most popular.

An electric thermos can be either a thermo mug powered by a car cigarette lighter or a large thermo pot powered by a 220 volt network. The first option is usually enough 12-volt voltage. Such devices will become indispensable for the following people:

• those who always need a hot drink;
• parents with small children who constantly need hot water of a certain temperature for making porridge or infant formula;
• lovers of picnics, hiking, hunting or fishing;
• drivers who spend a lot of time behind the wheel.

Heated models work on the principle of a standard thermos, only they have the ability to constantly keep the desired degree, from time to time including it in the network. The unit consists of the following parts:

• frame - as a rule, it is made of food grade stainless steel, less often of plastic that can withstand a high degree of boiling water; car options are in the shape of a mug, tapering downwards to fit in a standard cup holder, and thermal pots look like a large kettle;
• vacuum is located between the walls of the body and the inner flask, performing the function of thermal insulation; sometimes, instead of vacuum, the space is filled with a material with reduced thermal conductivity;
• handle and lid made of the same material as the body; the lid is equipped with a small hole for draining the liquid; both parts have high temperature resistance and are not subject to heat, which ensures the safety of use;
• sealant - for the tightness of the cover, the rubber ring and the cork installed on the body are responsible; they prevent the drink from pouring out, as well as the evaporation of warm air, thereby allowing the temperature to remain unchanged for longer;
• heating element located at the bottom of the thermos and hidden from view;
• charging connector - a wire is inserted inside to connect to the cigarette lighter or to a socket.

Heated thermoses, when disconnected from the power supply, start working like classic units that can keep the temperature of the drink unchanged for a long time. Of course, you will not get boiling water, but the minimum degree will vary from +70 to +75 ° C, which is optimal for tea and coffee. If the device is filled with liquid as much as possible, then it will take at least 15 minutes to warm up. Less water will take less time.

Electrothermos can be with a metal or plastic case. The inner flask of all models is made of stainless steel. Metal options keep the temperature unchanged longer, have increased strength, but at the same time they are more expensive.

Thermopots made of plastic are more affordable, but are prone to scratches and sometimes cracks or chips. In addition to the material of manufacture, electric thermoses differ in functionality. For example, you can buy a standard model without the bells and whistles, or you can buy a unit with an electronic screen and a timer that gives an alarm when a pre-set temperature is reached.

When choosing a car thermos or thermopot, you should pay attention to some details.

• Power. This factor is responsible for the rate of heating of the liquid. The higher the level, the faster the water will boil.
• Volume. The smaller the volume, the smaller the device will be. Choose a thermos according to your needs, depending on the amount of hot water consumed. For example, 3 liters will be enough for a home, 5 liters and more for an office and a cafe. When buying a car mug, calculate its volume depending on the time spent behind the wheel.
• Time to maintain the set temperature. Expensive models are designed for several heat modes, they can maintain a given degree, ranging from +40 to +70 ° С. In democratic products, only one mode is presented.
• blocking. This function is very important, because if it is available, the thermos automatically turns off if there is very little water.This prevents the device from burning out, and also increases its service life.
• Display. Models equipped with a screen are more convenient to use. Pay attention to the clarity of the numbers.
• Lid. Open and close it several times to make sure it works. It should close tightly and not let air through.

Modern manufacturers offer a wide range of heated thermoses.

• Rommelsbacher GA 1000. A large German-made thermopot with a volume of 7 liters has a power of 990 watts. The flask and the case are made of stainless steel. The electronic pump provides a snug fit of the elements to each other, respectively, the heat lasts longer. The model has seven temperature modes from +40 to +100 degrees.

• Aqua Work OB-009. A car thermos with a power of 76 W is charged from a 12 volt cigarette lighter. Volume - 300 ml, which is optimal for daily use. The case is made of heat-resistant glass, so you can easily pick up the device when the contents are hot. The kit comes with a holder that can be installed on the dashboard of the car. The temperature is adjustable from +20 to +80 degrees.

• Zojirushi CD-LCQ50. The model with a volume of 5 liters and a power of 800 W is perfect for a large family. The Japanese thermopot is made of plastic, the flask is made of stainless steel. The device is equipped with three temperature modes +60, +90 and +98 degrees.On the front of the lid there is a screen and a control panel that allows you to adjust the heat level, set the blocking of the water and steam supply. There is a self-cleaning and filtering function. Especially useful is the presence of a timer that allows you to delay the start up to 7 hours.

See below for an overview of the heated thermos.