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The circu-square straw has the typical circular straw you're used to on the upper edge of the bend, but transforms into a square shape on the longer edge below, allowing air to pass through standard circular holes. This prevents the regurgitation of liquid through the straw due to an increase in air pressure.
Hubei University of Technology
Wuhan, China
Zhang Kefan,
Hubei University of Technology
Joy Zhou ,
Hubei University of Technology
Liu Zhixiong,
Hubei University of Technology
Peng Cheng,
Hubei University of Technology