Since anon153 equated Coke with Coca-cola, the suggestion of Coke -> soda is the same as Coca-cola -> soda. A soda is not necessary Coca-cola but Coca-cola is a brand of soda. Likewise, a flying disc is not necessary a Frisbee but Frisbee is a brand of flaying disc, and a biscuit stick is not necessary Pocky but Pocky is a brand of biscuit stick.