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. 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, metal light pry
If the lid of the lunch box can't be opened, we can gently pry it up in the gap between the lid and the mouth of the cup with a knife, keys and other metal pieces. After air enters the lunch box, we can easily open the lunch box.