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When shower gel in the bottle is nearly used up, certain amount of liquid is left both on the inner sides and at the bottom. It has to be discarded because it is difficult to push them out for usage. A plastic edge is cut out at the bottom to change the bottle pack. When the liquid cannot be pushed out, the edge should be torn apart and the remaining liquid is out. This is very convenient and is not tool-assisted.
Zhou Ziyu Lu Xiangyi An Jingrui