PROBLEM TO BE SOLVED: To provide a drinking water bottle having a barrel double divided structure and a plug structure used as a cup in common in which either the same type of stored content or different kinds of stored contents can be stored and a removed cap can be used also as a cup.;SOLUTION: A barrel structure in a drinking water bottle molded by a synthetic resin material is formed by either a single barrel member or upper and lower separated double barrels to enable either the same type of stored content or different kinds of stored content to be stored and in turn the structure of a cap is of a double structure having an inner cap and an outer cap, wherein the inner cap has an original cap function in the same manner as that of the prior art and the outer cap has a function of the cup and thus the removed cap can be used as a cup.;COPYRIGHT: (C)2002,JPO
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