This is another one that's kind of divided amongst the various regions of the United States. Southerners pronounce the word with three syllables and emphasize the second syllable ('care-uh-mel'). Other areas, especially the north, pronounce it with two syllables and eradicate the second syllable that the Southerners emphasize (kar-mel).
Almost unanimously across the southern part of the United States, the generic term for a sweetened carbonated drink is 'coke.' This acts as an umbrella term, covering all the different types of soda, not just Coca-Cola. Meanwhile, most Northerners call soda's 'pop,' though some in the northeast just call them 'soda.'