Container for dispensing preservative-free preparations

A multiple dosage container for dispensing fluids comprising:

• a bottle having an interior chamber defined by a bottom portion, a top portion, and a flexible side wall portion, and having an opening in the top portion;
• fluid dispensing means secureable around the opening in the top portion of the bottle including,
• a hollow dispensing tip having a dispensing passage, a valve inside the fluid dispensing means beneath but aligned with the dispensing passage, the valve being movable between opened and closed positions but being resiliently biased in a direction opposite the dispensing passage by a biasing means to a normally closed position, thereby allowing flow through the fluid dispensing means form the bottle upon compressing the side wall portion of the bottle to the point where fluid pressure against the valve and towards the dispensing passage overcomes the biasing force of the biasing means, the valve including a valve guide defining a chamber having an open upper end substantially aligned with the dispensing passage, and a lower end defining a valve seat, the valve guide retaining a valve piston having a lower end comprising a valve head sealingly seatable within the valve seat, and which defines an opening to the bottle, and having an opposite end disposed towards the dispensing passage, the biasing means comprising a spring means contained within the valve guide and applying biasing force against an opposite side of the piston head from the valve seat, and means associated with the opposite end of the valve piston to prevent the opposite end of the valve piston from blocking the dispensing passage;
• air inlet means including,
• one or more channels in fluid communication between the interior and exterior of the bottle, the channels positioned in the fluid dispensing means near the valve means,
• a hydrophobic filter positioned in each channel, the filter having a pore size that prevents airborne microorganisms from entering the bottle and fluid from leaving the bottle;
• a dispensing tip guard positioned surrounding and extending outwardly a distance farther than the dispensing tip, and allowing fluid to pass from the dispensing tip externally of the tip guard, and
• so that air pressure in the bottle is equalized to the outside of the bottle when the valve is in the closed position, without contamination of the contents of the bottle, such-back through the fluid dispensing means into the bottle, or loss of fluid from the bottle and so that contact contamination with the dispensing tip is minimized by the tip guard.