It is not good for office workers to eat lunch fast food every day, which is neither nutritious nor hygienic. Therefore, many people will choose to bring their own meals to work, and then microwave them while eating. But many people often find that the lid of the lunch box is sucked and can't be opened. What if the lid of the lunch box is sucked? What if the lunch box can't be opened after heating?

1, soaked in hot water

Soak the plastic box in hot water immediately, or pour boiling water on the lid for a while, and the lid can be opened. This is because the lid was not opened before heating. During the heating process, the air in the box is heated and expanded, and the cover is opened to overflow. After stopping heating, the inside of the lid becomes negative pressure, so just soak it in hot water.

Step 2 reheat

The reason why the microwave lunch box can't be opened after heating is that the air in the microwave lunch box expands after heating, and some air overflows, resulting in the lid of the lunch box being sucked.

Suggestion: Reheat the microwave lunch box. After reheating, take out the microwave lunch box immediately and open the lid immediately, which will make it easy to open the lid.

Step 3 keep cool

If there is hot food in it, it means that the steam inside has absorbed the lid, and it can be opened when it is a little cooler. Or soak the lunch box in cold water to shrink, and separate the lid.

Step 4 lubricate

If the empty box can't be opened, it may be covered too tightly. It is recommended to use detergent for lubrication, which can be easily opened.

5. What material is good for the lunch box?

1, hard plastic material

This kind of lunch box has good high temperature resistance, light weight, convenient carrying, and the material is not easy to decompose at high temperature, so it belongs to a relatively healthy lunch box.

Pay attention to the manufacturing materials when buying plastic boxes. Because the heat resistance of polypropylene (PP) is higher than that of polyethylene (PE) and polystyrene (PS), it is suggested that families who have meals at work choose PP products. ..

2, stainless steel material

Some people like to bring homemade fruit salad. Cold dishes with only fruits and salads do not need high temperature heating, and stainless steel lunch boxes are more suitable.

3. Heat-resistant glass materials

Foods with high oil content and sugar content are recommended to be packed in glass lunch boxes or heated in microwave ovens, which will not decompose harmful substances and are relatively heavy and need to be carried in professional lunch bags.