Our Very First plastic bottle Prototype
This is what the first water filter looked like. We first put a thin layer of cloth around the top of the bottle, tying it with a rubber band. Next fine sand was put at the bottom of the bottle. Then a layer of activated carbon. After we put course sand then rocks. We tested our product. The water ended up being very 'mucky' (see picture 3) . We concluded that our next model we would use less materials, the sand would not bge as close to the cloth, and we would use a thicker layer of cloth