This is a great idea. Water sanitation is tied to affordability; if people can afford clean water, then the health repercussions wouldn't be as mass-scale as they are today. The fact that you have proven in your model to make water affordable is laudable. Congratulations.
Only suggestion is taking out the pitchfork from the Poseidon logo. Seems a bit overkill. Aside from that, the prototype looks great.
In response to Mr. Giok P Chua's comment, he has a good point that many cities are moving away from single use disposable bottles. If you could incentivize people to recycle the bottles after use, it would be more attractive to investors. Just an idea.