A dispenser for dispensing sterile solution which includes a valve to control the dispensing of the sterile solution from a container. The valve comprises a solution outlet and an air inlet opening having an associated filter membrane to filter the air passing into the container. When dispensing the solution, force applied to the container causes the solution outlet to open and prevents access of the solution to the air inlet opening. When the force is relieved, a partial vacuum is formed in the container which causes the solution outlet to close. Air is then drawn into the container via the air inlet opening and through the filter membrane.