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Due to the bottle has quite curved angle,so when we are drinking bottled water and winding bottleneck will hold some water in the bottle inadvertently ,which create great wast.180 bottleneck can let the water flows along a stright line,so all of water will be flow out of the bottle and then reduce the waste.
Zhengzhou University of Light Industry
Zhengzhou, China
Lei Yang,
Zhengzhou University of Light Industry
Chengyong Li
Jiajun Zhou
