And now, we’ve discovered another behind-the-scenes flying fact; Diet Coke is among the most complicated drinks staff have to pour mid-air. In fact, all fizzy drinks behave strangely due to the pressure in the cabin. Why is Diet Coke specifically so fizzy? The science makes sense, but why are people saying Diet Coke is more fizzy on flights, in particular? Well according to McGill, “Diet soda actually has a slightly higher viscosity than sugary soda, which slightly diminishes its fizzing potential.
