Cup lid can not open, what should I do?
The metal sheet is gently pried at the gap between the cup mouth and the cup cover, and the air is easy to open after entering.
With a rubber hammer gradually beat or get a thermos liner selling places, they have a rubber hammer and open techniques, like those of stainless steel shell for hot water bottles thread etc. they can be ectopic, treatment. Using a rubber hammer handle will not be damaged, it just is a thread. Because it's rubber, it doesn't cut dents. Of course, pay attention to the strength and position of the tap. Method four: drill a small hole on a cup (or a cover) to make it "leak" and achieve the balance of internal and external pressure. However, this can open the plastic cup, but does not apply to the thermos cup, so as to prevent the function and appearance of the thermos cup from damaging.
Pour the cup over and punch the bottom of the cup a few times before screwing it. If not valid, the cup can be soaked in hot water, so that the water in the stainless steel thermos cup is heated up and the volume expands (i.e., the pressure in the cup increases), and it is easy to open. Alternatively, the cup can be put into the refrigerator and can be opened easily after being taken out with hot water.
