The power of the sun is harnessed using a bottle full of water. Quite simply they’re used 2-liter soda bottles. They’ve been filled with water along with two caps worth of bleach to keep ...

Simply cut off the top from a clear 2-liter plastic soft drink bottle, leaving a flap for hanging. Use smaller bottles, which are extremely common household items for smaller tools.

That bottle could use some fins and a nose cone but there ... If you’ve already got a compressor and some empty 2-liter bottles you might also pick up some extra PVC to make this pressurized ...