Faced with the challenge of creating a non-electronic water consumption tracking bottle, we engineered the Rehydro Bottle. This bottle utilizes a magnetic mechanism that spins with water flow to move a mechanical counter. Capable of tracking up to 2 liters, this 100% mechanical device encourages consistent hydration. Developed with a focus on simplicity and sustainability, the Rehydro Bottle offers an eco-friendly, user-friendly method for hydration tracking, free from digital technology.