Patent ID: 7824546

Claim:
A canteen for holding unfiltered water and for discharging filtered water, said canteen comprising: (a) a reservoir for holding unfiltered water, said reservoir having a reservoir chamber and having an inlet port opening into said reservoir chamber for allowing unfiltered water to be poured into said reservoir chamber; (b) a first unitary structure defining a pump chamber and a filter chamber, said pump chamber and said filter chamber each having a top; (c) a valve for allowing unfiltered water to be pulled into said pump chamber from said reservoir and for preventing unfiltered water from being forced from said pump chamber into said reservoir; (d) a canteen body having a bottom and a threaded receiver fixed on said bottom; (e) a filter including a filter cartridge located within said filter chamber; said filter cartridge including filter media having a cylindrical filter media wall and a hollow interior for holding filtered water; (f) a second unitary structure forming a removable top and a spout, said spout communicating with said hollow interior of said filter media for allowing filtered water to be discharged from said canteen, said second unitary structure being removable from said canteen body with said first unitary structure being located between said removable top and said bottom of said canteen body, said removable top closing said tops of said pump and filter chambers and being separable therefrom; (g) a screw passing through said second unitary structure and through said hollow interior of said filter media and being threadedly engaged with said threaded receiver for holding said removable top to said canteen body and clamping said canteen body for defining said pump and filter chambers between said removable top and said bottom of said canteen body; (h) seals for preventing water from passing into said hollow interior of said filter media from said reservoir except through said cylindrical filter media wall; and (i) a pump for pumping water from said reservoir, through said filter, and then out said spout.