A flight attendant has explained why serving Diet Coke on board is a particular annoyance, due to the way it behaves at high altitudes. In a blog post, the crew member, known as 'Jet', described how fizzy drinks foam up significantly more when poured from a can in the pressurised cabin.
The reason lies in the lower air pressure at cruising altitude, which allows carbon dioxide to escape more easily. Diet Coke, in particular, is the worst offender, often requiring the attendant to wait for the bubbles to settle before finishing the pour. This can slow down the service, especially on shorter flights where every second counts.
Jet shared a clever trick to manage the issue: turning the can upside down when pouring. The air pressure keeps the liquid inside until the can is tilted slightly, giving greater control and reducing spillage. The technique has gained attention after a video demonstrating it amassed over half a million views.
Aside from the hassle for crew, passengers might also want to reconsider ordering carbonated drinks. The lower cabin pressure can cause gas to expand, leading to bloating and discomfort. Water is recommended as a better option for staying hydrated and avoiding headaches during the flight.
