Patent ID: 8142654

Claim:
A portable water bottle comprising: a bottle body with a wall structure extending from a bottom end to a top neck surrounding an open top, and said bottom end including an annular rim surrounding an open bottom, said open bottom and said open top communicating with an interior chamber that is surrounded by the wall structure, and said bottom end having exterior screw threads above said annular rim; a filter cartridge sized, structured and disposed for removable passage through said open bottom and into a lower portion of said interior chamber of said bottle body for filtering a flow of water being filled into said interior chamber, and said filter cartridge comprising: an outer shell defined by a ridged wall extending from a first open end to a second end and said outer shell including an annular flange at said first open end for seated engagement with said annular rim of said bottle body when said filter cartridge is fully inserted through said open bottom of said bottle body to define an operable position of said filter cartridge relative to said bottle body, and said annular flange stopping said filter cartridge from moving further into said interior chamber of said bottle body beyond said operable position; a filter assembly within said outer shell and including a first filter membrane, a second filter membrane proximate to said second end of said outer shell, and a carbon based media sandwiched between said first filter membrane and said second filter membrane; a bottom cap including interior screw threads, and said bottom cap being structured and disposed for removable attachment to said bottom end of said bottle body by threaded engagement of said exterior screw threads of said bottle body with said interior screw threads of said bottom cap, and said bottom cap being further structured and disposed for holding said filter cartridge in said operable position and sealing said open bottom of said bottle body water tight when said bottom cap is attached to said bottom end of said bottle body; and a top cap for removable attachment to said top neck for covering said open top and sealing said open top watertight.