In daily life, we often need to properly handle the unfinished food to prevent it from spoilage. When we buy fruit home, we sometimes need to preserve it, especially in hot summer. If we don't pay attention to it, the fruit will go bad, which not only wastes money, but also affects our health. In ancient times, people often put leftover food in bowls and put it in cold water to prolong the deterioration period of food at low temperature. Today, with the development of science and technology, people have invented refrigerators, plastic wrap and boxes to realize the function of preserving food. Fresh-keeping box can be said to be the most used way to preserve food at present. The function of fresh-keeping box is not only reflected in fresh-keeping, but also has many specific functions.

The most common crisper we use is plastic crisper. The common plastic fresh-keeping box is made of resin, which is widely used in various fields and has very mature technology. The fresh-keeping box made of resin is durable, but one thing is that it is not resistant to high temperature. The highest temperature it can withstand is about 120 degrees Celsius, and the lowest temperature is about MINUS 20 degrees Celsius. It is more than enough to cope with the daily temperature hi.

The most important function of the fresh-keeping box is to keep fresh. In our daily home life, we will make all kinds of ingredients, which can be roughly divided into raw ingredients and cooked ingredients. If raw ingredients are mixed with cooked ingredients, once one ingredient goes bad, other ingredients will soon go bad, and raw ingredients contain some bacteria harmful to human body, which may be transmitted to cooked ingredients. At this time, it is necessary to separate raw materials from cooked materials and store them in the refrigerator in different categories, thus avoiding cross-infection and prolonging the shelf life of food.

The crisper can also be put into the microwave oven for heating. Ordinary plastic crisper can't be put into microwave oven for heating, because when the plastic is heated to a higher temperature, it will produce harmful substances to human body and affect health. What can be put into the microwave oven is a heat-resistant glass fresh-keeping box, which is made of high borosilicate glass. We can put food in a heat-resistant glass crisper, and then put the whole crisper in a microwave oven for heating, which saves time and is very convenient.

Another function of using the crisper is to save space. The space of the refrigerator is limited, so it is undoubtedly a great waste to throw things that need heat preservation into the refrigerator casually. Fresh-keeping boxes have different shapes, which can be arranged and combined according to the different needs of users. According to statistics, using fresh-keeping boxes can save up to 40% refrigerator space than not using them. In addition, most of the fresh-keeping boxes are transparent. When we are looking for what we need, we can directly see the items in the fresh-keeping boxes, thus saving us the trouble of finding one by one and saving us a lot of time.