
Diet Coke.
The Big Bang Theory Season 1, Episode 13

Sure. Take a Diet Coke, thank you.
Of course.
Breaking Bad Season 4, Episode 7

Diet Coke, please.
Breaking Bad Season 2, Episode 11

...while Howard threw up
Red Vines and cherry Coke.
The Big Bang Theory Season 4, Episode 20

How hard is 65% Coke,
35% Diet Coke?
The Big Bang Theory Season 12, Episode 23