A slow-release irrigation device having a housing with an open and closed end, and a water reservoir located therein, a circumferential channel located proximal to the open end providing a watertight engagement with a neck opening of a beverage container, a water channel connected to the water reservoir and having a water receiving inlet and an outlet for directing water into the water reservoir while simultaneously operating as a water seal for the housing, a housing water outlet located between the ends of the housing and directly connecting the water reservoir with the external environment, an air channel located within the housing, an air tube connecting the water reservoir to an interior of the container; and a permeable membrane located within the air channel and controlling the passage of air through an air outlet of the air tube.