I also like Mountain Dew, and am in fact a girl.
And, dude, Pepsi Twist (not diet... ewww) is AMAZING. I think it's stopped being produced, though.
Every time I buy it, the expiration date is REALLY close to the actual date (one was actually expired). I'm gonna be really sad when it's all sold out and I can't get it anymore. It's so good.
And, I can tell the difference between Coke and Pepsi in unmarked cups. If I'm at someone's house, and ask for Pepsi, and they bring me back a cup, and it's Coke, I can tell. And I ask (in a negative tone), "is this Coke???" And they say yes. Haha. I don't do that if I'm not really good friends with the person, though (haha, I'm not THAT rude
). Although, fountain Coke and Pepsi are pretty much identical. Fountain anything is always so much better (unless, of course, it's watered down, or has too much syrup in it).
*is a soda expert*