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Sharing one bottle is frequently happened. For people who live in arid regions, they share precious water with others for limited distribution. But this kind of sharing increases the possibility of pathogens transmission for many diseases can be transmitted through saliva.Bottle++ with multiple bottlenecks provides an effective solution for one bottle sharing. By opening different layers of bottle caps, people can drink water with their own clear bottleneck. With the general sealing structure, people can bring as many bottlenecks as needed. Everyone can distinguish their unique bottle mouth of various colors.