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In general,essnece is semifluid and can hardly moves.So essnece in the bottom of the bottle can hardly be squeezed out . And the price ofessnece is very expensive in usual,so it may be a waste for women.Now the bottom of the bottle can open independetly,this make people more easy get essnece in bottom.
Nanjing Foresty University
Nanjing, China
YuTing Shi,
Nanjing Foresty University