The Viski 842094181674 Gunmetal Aerating Pour Spout is a bottle accessory that combines pouring with aeration during wine service. It fits into a compatible bottle opening and directs wine into a glass while exposing the flowing liquid to air. This process can assist the wine's aeration as it is poured, depending on the wine and serving conditions. The spout is suitable for home entertaining and hospitality settings where wine is served by the glass. Follow the manufacturer's instructions.