Abstract: A nasal rinsing cap suitable for standard water bottle is disclosed. The body portion of the device can be attached to the top of the bottle. It has a cylindrical void matching the threaded portion of the bottle and a one-way fluid valve attached to another void extending from the cylindrical void and through the body portion. The body portion also includes a one-way air valve allowing the entry of air into the bottle. A top portion is removably or openably attached to the body portion. It has a tubular opening starting near the body portion and extending through the top portion. The top portion is configured so that it has a tip to be contacted with the user's nasal cavities. The top portion also has a pressure zone for closing the fluid valve by applying a pressure on it.