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A crowd of people get together, each of who orders a bottle of mineral water and drinks a little. Then everyone puts it in front of him so that he is apt to confuse his from theirs. Owing to various reasons, he doesn’t drink the original one and order a new one. People can distinguish between their respective water bottles by identifying different patterns.Jigsaw puzzle is not only a patter, but also a story, a memory and a tender feeling. The caps of a case of mineral water can be assembled into a pattern.It is more convenient to operate if the cap made of pure circular is turned into quadrate above and circular bottom.