Fountain pen

A fountain pen comprising:

• a body, said body being generally cylindrical in shape, said body having a first end and a second end, said body having a wall member defining an interior volume, said interior volume of said body being substantially hollow, said body having a barrel portion extending from said second end and a grip portion extending from said first end, said barrel portion and said grip portion being rotatably coupled;
• a non-rotating rod member, said rod member being mounted within the interior volume of said body, said rod member having a first end and a second end, said first end of said rod member being secured to an interior surface of said wall member of said body proximate said first end of said body, said second end of said rod member being secured to an interior surface of said wall member proximate said second end of said body;
• a piston head member, said piston head member being operably coupled to said rod member, said piston head member having a perimeter edge, said perimeter edge of said piston head member being sealably coupled to an interior surface of said wall member along said barrel portion;
• and
• a movement member, said movement member being formed on the interior surface of the wall member within said barrel portion, said movement member being operably coupled to said piston head member,
• wherein rotation of said barrel portion of said body facilitates movement of the piston head member along said rod member to both withdraw ink into the body via the first end and dispense ink from the body via the first end.