ReNu Preservative Free Lubricating & Rewetting Drops is supplied in 4 foil pouches each containing 5 sterile 0.01 fl oz (0.3 ml) Disposable, Single-use Containers. Preservative free. Fresh lens comfort. For use with soft (hydrophilic) contact lenses. ReNu Preservative Free Lubricating & Rewetting Drops is specially formulated for use with soft (hydrophilic) contact lenses to lubricate, cushion and rewet lenses during wear. If you are allergic to any ingredient in this product, do not use. Use as needed, 2-3 times a day or as directed by your eye care professional. Use while wearing lenses to moisten and lubricate your lenses and to relieve minor irritation discomfort and burning.