Unless it is being used as a mixer than it is Vanilla Coke or Reg. Coke in a pinch.
And yes it is SODA. Though I SWEAR growing up (SoCal, until 12) we called it pop. I remember my grandma telling me a story about her neighbor coming over and asking if she had any soda and she thought she was talking about soda crackers.
I hardly every drink pop - I just don't really like sweet beverages of any kind. The one exception is A&W rootbeer, which I had yesterday with a burger and onion rings for supper. It's not quite as good when you get it from the drive-thru, without the frosty mug.
The pop I like is Coke Zero. I absolutely love it, but I was drinking too much of it and didn’t think it was good for me so now it’s an occasional treat. I’d really really like one right now, but I don’t keep it in the house and it’s not worth driving somewhere for.
Sundrop. But never after 5 or 6 because it is loaded with caffeine! It is mostly available in the South and Midwest. It almost has a cult-like following in our area.