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If I want a Coke, I say "Coke."

If I want a Pepsi, I say "Pepsi."

If I want a Dr Pepper, I say "Dr Pepper."

etc, etc, etc.

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But what if you want to say, "I wonder what type of _____ they have." Would you say Soda or Pop? Obviously, saying "I wonder what type of Mr. Pibb they have" doesn't make a whole lot of sense.

I say soda, btw.