Correção de texto: Pop, coke, soda

Do you want a pop? How about a soda? I'd rather a soda. I think you know all of them is the same. It is funny, how word can change from a side the coutry to another. In the south it is commun they ask for a coke, in the north is is more commum they ask for a pop. Pop seem extrange to me but i know it is corret. It happen whit other words and expresions that may have most of one way to say them.