Water filter bottle

This invention describes a personal water filter bottle with two internal sections: an upper one for unfiltered water and a lower one for filtered water. A disposable filter cartridge screws into the bottom of the upper section, allowing water to flow through it by gravity into the lower section. When the bottle is tipped, filtered water travels through internal channels to a drinking spout at the top.

Why it matters: Filter media advancements since 2003 enable more efficient gravity-fed purification within compact designs. Modern polymer manufacturing also offers improved durability and cost efficiency for the container.

Status: ExpiredProtection ended and was never renewed
How hard to build: ModerateMolded plastic container, threaded filter cartridge

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