Plural of coke: either a type of fuel made from coal, or (often capitalized) a brand name for Coca-Cola soft drink.
Coke the fuel comes from Dutch 'cooks' (coal dust); Coke the drink is a trademark from 1887. The same spelling creates an interesting homonym in English.
Coca-Cola is so dominant as a brand that in many parts of the world, 'Coke' became the generic term for any cola drink—a phenomenon called 'proprietary eponym'—similar to how people say 'Kleenex' for any tissue or 'Band-Aid' for any bandage.
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