The Holy Grayl of Water Filters

The Holy Grayl of Water Filters

An innovative duo showcase their new brand of water filtration system: Grayl. Grayl is a water filter that works much like a French press does for coffee. But can something so compact make even toilet water clean enough to drink? | For more, visit http://www.sciencechannel.com/tv-shows/all-american-makers/#mkcpgn=ytsci1

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