How to keep ice cream from melting with a thermos?

The favorite cooling treat of all children and adults melts very quickly, especially on a hot summer day. If you decide to have a picnic, then storage of ice cream in a thermos will be an excellent outlet for you. All guests will be extremely surprised when, after a 3-hour trip to the summer heat, you will treat them whole, not melted frozen juice or creamy popsicle. This is quite feasible, it is only necessary to know the elementary laws of physics.

Ice cream, oddly enough, is not a find of Europeans and Americans at all. The French are convinced that it was their “popsicle” that became the progenitor of all modern varieties of ice cream, but this is not so. For the first time, an exotic dessert at that time arose in China. Only very wealthy people could pamper themselves with a new cold dish. Cooking technology was kept secret. In fact, the juice of fruits and berries was mixed with ice, getting fruit ice from it.

What affects the shelf life of ice cream?

Like all dairy products, ice cream is dangerous if it has long expired. Shelf life depends solely on the products that are included in the composition: the more natural they are, the faster you need to eat ice cream. The main components of a classic creamy ice cream are milk, cream, butter, sweeteners (honey, sugar or molasses) and a stabilizer. All products must be fresh and of high quality so that the finished ice cream can be stored for a long time.

Before getting into store freezers, ice cream goes through many stages of preparation:

• cleaning and filtering all necessary components;
• pasteurization of the mixture (heating to a temperature of 85 degrees for 20 minutes);
• "Ripening" of ice cream at a temperature of 15 degrees in special containers;
• whipping to obtain a structure of gentle homogeneous mass;
• hardening at a temperature of minus 35 degrees;
• packing.

The quality of the paper in which the product is packaged and the integrity of the packaging not only determine the appearance. Packaging is responsible for the safety of ice cream: if it is broken, the shelf life is reduced, and ice cream can get an unpleasant aftertaste.

How to store ice cream?

In order for us to get quality products in stores, they are stored in enterprises under certain conditions. The temperature ranges from -30 to -20 degrees. The main condition is not to subject the ice cream to sudden changes in temperature. If the mass has melted, upon repeated freezing, it will become solid and lose its taste.

Tip

After buying ice cream, eat it immediately, do not try to re-freeze the melted product.

Ice cream in stores should not be in the chamber with other products. It easily absorbs odors. In addition, storage in the same chamber with meat can lead to food poisoning. Failure to comply with the rules is fraught not only with damage to your favorite treats, but also with diseases.

How long is your favorite ice cream stored?

Despite the long shelf life not indicated on the packages, milk or fruit ice cream, it can be stored for a very short time.

Consider the shelf life of individual types of ice cream.

• Dairy without additives (nuts, jam, condensed milk) - 75 days.
• Dairy with filler - 60 days.
• Creamy - 100 days.
• Ice cream (creamy and chocolate) - 120 days.
• Fruit and berry - 45 days.
• Fruit ice - 90 days.

The above figures refer to portioned desserts, the weight of which is not more than 100 g.Large packages (more than 1 kg) can be stored half as much. All the above dates apply only if the ice cream is stored at a temperature not exceeding -12 degrees.

How to keep ice cream without a freezer?

If you decide to surprise your friends and take an ice cream with you on a picnic, you can use simpler means than a portable refrigerator. The cooler bag comes to mind first. Yes, ice cream can “live” in it for about 2 hours, but not everyone will want to drag a huge bag with them for the sake of 3 servings of ice cream.

Everyone who remembers physics at least a little from school knows that if a device is capable of storing heat for a long time, it must accordingly retain the cold in itself. If a thermos keeps the warmth of brewed tea for a long time on a winter day, then why not use it to save ice cream in the summertime?

Thermoses come with glass and metal inner flasks. Metal thermoses are considered more practical, since they are able to store heat for 12 hours, while glass ones store it for no more than 6 hours. But the time to preserve the cold in any thermos is the same. The fact is that the vacuum layer between the two cylinders contributes to a decrease in the heat transfer coefficient.

How to store ice cream in a thermos?

The main condition for the longest storage of ice cream in a thermos is the lack of free space. If you want to treat a large company and take a weight ice cream with you on a hike, fill them with a thermos to the neck. The mass must be well rammed with a spoon so that there are no air gaps. In this state, a thermos with ice cream can be stored for up to 4 hours. After 4-5 hours, it will begin to thaw, and after a couple of hours it may deteriorate and become unfit for consumption.

If you bring portioned ice cream with you, do not violate the integrity of the packaging. Be sure to place ice cubes in a thermos, they will create additional cold. Ice cream can be stored in a thermos for 5 hours. Carefully inspect the packaging before placing it in a container: water from melted ice can get into the ice cream.

Storage of a cold dessert in a thermos depends on the temperature in the street and on exposure to sunlight. If you decide to take ice cream in a thermos to the beach, wrap it in a towel, put it in a bag and put in the shade. If you leave a thermos in the sun, in an hour the ice cream will turn into a warm milkshake.

Saving ice cream on a summer day without a freezer seems like an impossible plan, but just remember the elementary laws of physics, and the decision comes by itself. If you decide to experiment, watch the time: even in a thermos ice cream can go bad.