The flexible sterile water bag is 2000 mL in a closed system to maintain sterility. The bag is attached to a feeding set to flush or clean the feeding set or provide additional hydration. The bag of sterile water is an option to refill the nebulizer for inhalation respiratory therapy. Sterile water can also be added to refilling chambers such as humidifiers. The AirLife Modudose unit dose of sterile water in 3 mL has graduations along the vial to dispense by the drop or as a stream to facilitate tracheal suction systems when clearing mucus in the tracheostomy. The prefilled bottles in 500 or 1000 mL are designed to refill a nebulizer for inhalation.