Double layer glass cups have excellent performance and can be applied in various occasions with diverse styles. For glass tea cups, it is recommended to use high borosilicate glass. This type of glass is not only stronger and more transparent, but also won't be stained by tea for a long time and is cleaner. However, this problem often occurs during use. After being left overnight, the lid of the double layer glass cup cannot be opened the next day, Here's how to handle this situation.
Method 1: Invert the cup, tap the bottom of the cup several times, and then unscrew the lid,
Method 2: The cup can be soaked in hot water, so that when the water in the double-layer glass becomes hot and expands in volume, it can be easily opened using the principles of thermal expansion and cold contraction.
Method 3: You can put the cup into the refrigerator for quick freezing, and after taking it out, you can pour hot water on the lid, which is easy to open.
Method 4: Gently pry open the gap between the cup mouth and lid with a thin metal sheet, and then easily open it with a small amount of air.
Method 5: Place the cup in its original position until the water in the cup cools down, and then the lid can be opened. This is a slow approach.
Method 6: Twist vigorously. When the force we use reaches a certain level (that is, when the friction between the force we use and the cup cover is greater than the pressure caused by the temperature difference), the cup cover is unscrewed, which is not recommended.