Multiple color marker

A retractable marker comprising:

• a housing having first and second ends, a first opening on the first end and a second opening on the second end;
• a plurality of reservoir bodies positioned in the housing, each of the reservoir bodies having a tube extending therefrom and a writing nib extending from the tube;
• a slit valve made from a flexible polymer positioned at the first opening of the housing;
• a lobe seal made from a flexible polymer positioned in the housing spaced from the slit valve such that a chamber is formed between the lobe seal and the slit valve, the lobe seal have a plurality of inner lobe seals wherein each inner lobe seal sealing receives one of the respective tubes therethrough such that the writing nib on the respective tube is positioned within the chamber between the slit valve and the lobe seal in an airtight manner when in a retracted position;
• a platform made from a relatively hard material positioned adjacent the lobe seal, the platform having a plurality of openings which align with the plurality of inner lobe seals such that each tube passes through a respective one of the openings;
• and
• an actuation system positioned at the second opening of the housing, the actuation system selectively actuating one of the reservoir bodies to enable the writing nib on the selected reservoir body to project from the chamber and through the slit valve to extend the writing nib to a writing position for writing and for selectively retracting the writing nib on the selected reservoir back through the slit valve and into the chamber such that the writing nib may be stored in an air tight manner when not in use.