What is a freshness box

1、Preservation principle

Fresh boxes are mainly used to preserve food. Their principle is to isolate air and bacteria, reduce the growth of microorganisms, inhibit food respiration, slow down food metabolism, and thus achieve preservation. The fresh-keeping boxes on the market mainly achieve preservation through sealing, and some products also enhance preservation by vacuuming.

2、Classification of fresh-keeping boxes

• Classified by function

Only for storage purposes, such as putting food in the refrigerator, etc;

Not only can it be stored, but it can also be used for meals and heated (bento box);

• Classified by material

Plastic, commonly such as PP (polypropylene, No. 5);

Glass, commonly known as heat-resistant high borosilicate glass;

Stainless steel, commonly such as 304 stainless steel;

Ceramics;

Plastic is the most common type of fresh-keeping box material, which is lightweight, easy to clean, relatively well sealed, and has a variety of styles. Generally, it should not be placed in an oven, and a few points should be noted:

Regarding microwave heating, please pay attention to the usage range and heat resistance temperature stated in the product manual. Only those with a heat resistance of 100 ° C or above are allowed. Please refer to the product manual for accuracy, as some fresh-keeping boxes may not be suitable;

Regarding the safety of heating plastic fresh-keeping boxes, as long as it is a legitimate and reliable brand, the product description generally indicates whether the material used is food grade and whether it can be heated;

Common plastics include PP (polypropylene, No. 5), which is non-toxic, odorless, collision resistant, and can be heated in a microwave oven;

There are mainly two types of glass: ordinary lead-free glass and high borosilicate glass. Ordinary lead-free glass belongs to heat-resistant glass and should not be subjected to sudden heating or cooling as it may crack; High borosilicate glass can withstand heat shock and can be used with confidence. It can be heated in a microwave or oven, but generally does not have handles, so be careful not to get hot.

Stainless steel is a metallic material and cannot be placed in a microwave oven. Stainless steel has high strength, high temperature resistance, drop and wear resistance, and good thermal conductivity.

Divided by shape

square

rotundity

Square fresh-keeping box, with higher space utilization.

There are more and more styles and sizes of fresh-keeping boxes on the market. To avoid being picky, let's talk about how to choose a fresh-keeping box.

3、 Key points for choosing a fresh-keeping box

For fresh-keeping boxes without heating requirements, such as bringing some fruits when going out or storing cold dishes at home, plastic fresh-keeping boxes are very suitable.

For the freshness box that needs to be heated, it is also necessary to distinguish the heating method:

Stainless steel material cannot be heated in a microwave oven, but can be heated using an induction cooker, oven, or stove;

The glass material should be heat-resistant high borosilicate glass, so there is no need to worry about safety. The disadvantage is that it is fragile and heavy;

If it's just for storage, choose a few commonly used sizes that are more practical. It's not recommended to buy sets with too many sizes and shapes, as they are flashy but not practical. If it is still used as a bento box, whether to choose to have compartments depends on personal preference. I still prefer not to have compartments, as they have a larger capacity and do not care about the mixing of dishes. If there are few dishes, they can be packed empty.

Try to choose products from reputable big brands for peace of mind.

4、 Precautions for using fresh-keeping boxes

What should I do if the sealing strip is moldy and how to clean it

Most fresh-keeping boxes have sealing rings, which may become dirty, moldy, and prone to bacterial growth over time. Regular cleaning is necessary. You can remove the sealing ring, soak it in some detergent, brush it with a brush, wash it clean, and then air dry before putting it back on. It is best not to heat the sealing ring with boiling water, as it is prone to deformation and reinstallation may affect the sealing effect.

After understanding all aspects of fresh-keeping boxes, we will recommend some very useful fresh-keeping boxes according to their functions.

5、 Summary

A freshness box is a versatile tool that can help us store vegetables, fruits, and meals at home, preserve vegetables and fruits, and even bring food and fruits with us when we go out. In addition, it can also be a beauty accessory. Since using it, I have fallen in love with it.