There is a reason why cabin crews do not want you to order a Diet Coke at 30,000ft - and it's all to do with cabin pressure. But as the crew member Jet explains - the Diet Coke that can be the problem. In a video demonstrating how Diet Coke can be difficult to pour, the cabin crew said: "What you can't see is that the Diet Coke doesn't come out of the can when flipped upside down until you lift it up and tilt it slightly. This is because the air pressure is keeping the Coke in the can. It makes pouring the Diet Coke very controllable and reduces the chances of spilling or overflow."

Source: The Star May 17, 2022 10:00 UTC