Pen dispenser with plastic spring actuator

A pen dispenser comprising:

• a tube having an open top for holding a fluid to be dispensed;
• a valve housing made of plastic and having channels on an inner wall;
• an applicator nib made of plastic;
• a plastic spring actuator having an elastic button, which is connected to the applicator nib, and
• a button retainer having an outer ledge extending along the entire outer perimeter thereof, wherein a bottom edge of the elastic button engages the outer ledge of the button retainer,
• whereby in a closed position the plastic spring actuator is sealingly engaged to the valve housing blocking the flow of fluid out around the applicator nib, and in the open position, the plastic spring actuator is depressed so it is no longer sealingly engaged to the valve housing, allowing the fluid to flow through the channels on the inner wall and exit the dispenser around the applicator nib;
• wherein the button retainer has two or more projections;
• and
• the valve housing has two or more grooves and two or more corresponding ledges;
• wherein the valve housing is configured to allow the button retainer projections to slide through the housing grooves, the valve housing further configured to allow the valve housing ledges to support the button retainer projections.