Why a bottle cover lid is difficult to open when take out from fridge?

The difficulty in opening a bottle cover lid after taking it out of the fridge can be attributed to the change in temperature and the resulting pressure difference.

When a bottle is placed in the fridge, the cold temperature causes the air inside the bottle to contract. This contraction reduces the pressure inside the bottle compared to the atmospheric pressure outside. As a result, the pressure difference creates a force that pushes the lid down, making it harder to open.

When the bottle is taken out of the fridge and brought back to room temperature, the air inside starts to expand. This expansion increases the pressure inside the bottle, which pushes the lid up, making it easier to open.

The amount of difficulty in opening the lid depends on several factors, such as the temperature difference between the fridge and the room, the type of bottle, and the design of the lid. Some bottle lids are designed with a pressure-release mechanism to prevent this issue.