NIRNAL - World's Cheapest Water Filter By Niranjan Karagi.
Kiran Kumar S on Twitter: "Looks like many people are interested in contacting Niranjan Karagi after hearing about his amazing portable water filter #MakeInIndia invention. You can find his contact info at
Mechanical engineer's Rs 30 water filter: Perfect solution to clean drinking water in India
How this 22 year old Engineering Student created World's First Portable Water Purifier 'Nirnal' - Student Stories