Filtering water bottle

This is a personal, portable water filter shaped like a tube or cylinder. It works by letting water flow through a filter media held between permeable layers at the top and bottom, using gravity to clean the water.

Why it matters: Since 2021, advancements in sorption and ion-exchange materials, as indicated by the classifications, could offer more efficient or cost-effective filtration for gravity-fed systems.

Status: Not in forceListed as no longer active. The specific reason is not in the record we hold.
How hard to build: ModerateMolded plastic housing, filtration media.

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