We worked on improving our design to speed up the pumping process. We are adding a piece that moves up and down somewhat below the bottle, with part of it inside the bottle. It is a pipe attached to a circular platform weighing down int the water and a float keeping it afloat. This will have a one way valve that opens when the water is coming up but closes when it is coming down only allowing the water to flow out. This moves on it's own SEPERATE to the bottle, forcing a whole lot more water out.