Pop vs Soda

Some how growing up I managed to pick up the habit of calling Soda, 'Coke'. As in;

"Would you like a Coke?"
"Yes"
"What Kind"

Mind you this was back when there was only one kind of Coke.

I have come to learn that what one calls bubbly sugar water is heavily influenced by where you grew up as evidenced by this interactive map



How I ended up using a Southern idiom growing up in LA is beyond me.