What happens when food coloring is mixed with Sprite, Vodka, or another clear liquid?

When you apply food coloring to Sprite, Vodka, or another clear smooth flowing liquid(besides water) what happens to the food coloring. Lines are formed. So with the selected liquid what kind of lines are formed, thin or thick, do they swirl or diffuse?What happens when food coloring is mixed with Sprite, Vodka, or another clear liquid?
In an effervescent (like a carbonated beverage) it diffuses.





In a plain clear liquid with minimal flow, the lines could be due to differences in density or temperature.





EDIT: In a carbonated beverage, the bubbles tend to ';churn'; the clear liquid and food coloring.