The first one had me grinning, the second one... well, I tried, but it got me.
The Transformers thing is... okay, kind of funny (I feel culturally ignorant for not getting what I'm assuming is an explicit reference to a Coke ad there). However, its humor is magnified by the assumption that those sinister eyes are actually permanent marker cover-ups, thus making the drink "COC COLA"
As for the last one, maybe YFO,YL would've been more appropriate...