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In daily life we often encountered a problem that it's hard to reach the cup bottom when we want to wash a deep cup with our hands. so that it is not easy to brush up the cup.
This design can effectively solve the problem which because of the deep jar containers can't be wash easily.Through the theconstriction of spring to make brush a fast rotating towash cup.The brush can be extended to clean different depth of containers.
It is simple, low cost.