Innovation doesn’t always need million-dollar labs — sometimes, just a soda bottle and water will do. In China, a group of students engineered a working two-stage rocket using a simple cola bottle and water pressure. The creative project demonstrates core rocket science principles like propulsion, staging, and aerodynamics — all on a budget. While it might look like a science fair stunt, this experiment reflects hands-on learning at its best. It's a reminder that curiosity and creativity can fue