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We usually waste too much liquid when using press bottle, and that's because the strength which we press each time is too strong and not the same .
The concept is designed to solve the problem .
Adding the external screw on the tube of press bottle, which used with the ‘‘rotating ring’’. Users can control the quantity of per pressing by adjust the position of the rotating ring .
In this way, the quantity of each pressing would conform to individual demand and maintain constant .
(the rotating ring: a part of present press bottle, which is capable to be divided and there's internal screw on it.)