HydroChurn is a portable, self-sustaining water purification bottle. It makes unsafe or uncertain water sources drinkable using a multi-stage filtration and UV sterilization system. Water first goes through a steel mesh and a 5-micron cotton pre-filter. Then, it passes through ultrafiltration membranes, activated charcoal, and a KDF filter to remove sediments, chemicals, and contaminants. A built-in hand crank powers a dynamo that runs the internal pump and UV germicidal LEDs, so the device can operate without external electricity. The design was created to address the global shortage of safe drinking water. It is also inspired by the team's experience of getting sick after drinking from a stream. The goal is to provide an affordable, reliable, off-grid solution for trekkers, rural communities, and emergency situations.