SODA BOTTLES - at least 2 each (recommend 2 liters size works best).
FIN MATERIAL - must be lightweight - rigid - waterproof. Coroplast sign material, also known as Fluted Plastic or corrugated plastic, common for political road signs, works well.]
ADHESIVE - for joining fins to Booster rocket, or joining fins to slide on fin assembly, or joining booster to a Nose Cone. 3M Black (or Yellow) Super Weatherstrip and Gasket Adhesive is the best performer.
WATER - usually about 1/3 full in Booster rocket & several ounces in Nose Cone.
AIR - pressure range from 15 - 100 psi work on a Bigfoot Water Rocket Launcher.