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It is common that several people share one cup of water. When this happens, liquid enters the mouth through the straw and part of it flows back to the cup, which is unhygienic.
The upside-down triangle at the bottom of this straw can avoid the inverse flow efficiently, so that making the drinking process more hygienic. Whats more, the design of the triangle at the bottom of the straw can pierce the package of the beverage easily when unpacked.


Huaqiao University

Huaqiao University
Xiamen, China

Zhaoyu Wang,
Huaqiao University