The cup was full of hot water, but the lid was too tight at the time. Now it won't screw. How can I unscrew it?
There is a vacuum, if your cup is a Senior Cup, the cup has a pressure relief device you twist it is good, if it is to come and take a few ordinary cup, the force will be opened in Hold bottle with a veil
Lever the bottle top with a flat electric screwdriver to let air in, and then open it easily. Or heat the glass in hot water and open it.
Heat again. Throw the cup into the hot water for a few minutes, then wrap it with a towel and screw it.
