Final answer:
The visually convincing demonstration of purifying dirty water and consuming it on the spot made the pitch valuable by demonstrating market demand, practicality, and scientific claims.
Step-by-step explanation:
The highly convincing visual demonstration of purifying disgustingly dirty water and consuming it on the spot made the pitch for the LifeSaver bottle valuable for several reasons.
Firstly, it demonstrated a market for emergency water supplies, showing the potential demand for the product in situations where clean drinking water is not readily available.
Secondly, it showed that ordinary people would be willing to use the product, proving its practicality and usability.
Lastly, the demonstration helped distinguish the LifeSaver bottle from other potential startups seeking funding, making it stand out with its scientific claims backed by a real-life example.