Hi tech "tea bags" to provide clean water in Africa and elsewhere.

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While it may look like an ordinary tea bag, the small sachet could deliver clean water to hundreds of millions of people in Africa.

"They would go to a river; they would scoop up the water from the river. They would insert the filter in the bottle, in the special cartridge that we are busy prototyping, and they would drink the water. It is as simple as that," he said.

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