The origami Water Bomb Base is also known as the Balloon Base. It is probably better known as the water bomb base because this is the base of making the infamous water bomb paper fold. And yes it does work as a water bomb!
Download the PDF version of these instructions: WaterBombBase-Origami-Diagram.pdf
Download the DWG version of these instructions: WaterBombBase-Origami-Diagram.dwg
Download the CTB file for printing the DWG version: OrigamiPlotStyle.ctb