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Through the design of the mouth of toothpaste,it makes the Cross-section of the mouth becoming the shape of Larg semicircle and having the jagged inside ,so that the contact area of the toothpaste and toothbrush becoming large,increasing the friction to prevent toothpaste from falling off in the process of brushing your teeth.
Nanjing University of science
and technology
nanjing, China
南京理工大学
南京, China
Nanjing University of science
and technology
nanjing, China
南京理工大学
南京, China
Wang Jing
Chen Tao
Liu Tingting
Cao Yuhong