Why flight attendants hate serving you a Diet Coke

If you hear a flight attendant give a little sigh when you order a Diet Coke, you're about to learn why. According to a flight attendant on the flight blog These Golden Wings, Diet Coke takes the longest amount of time to pour. The author explains that high altitude makes carbonated drinks foam up more, and Diet Coke is the worst. The blog entry reads, "Pouring Diet Coke is one the biggest slow-downs in bar service and on shorter flights those precious seconds count!" A study by Illinois State University confirms that Diet Coke has higher levels of carbon dioxide than regular Coke, making it more fizzy, even on the ground.