The Coravin Pivot system employs the use of 99.99% pure argon gas capsules to pressurize your dispensing system. By utilizing the Pivot system, you can pour approximately (20) 5-ounce glasses with the push of a button. With a sleek black color, the Coravin device does not distract from the look of your wine bottles. Attach the included aerator to the Pivot spout to aerate wine while you pour for a smooth, delicious taste. You can preserve your wine for up to 4 weeks and it will maintain the same taste and quality.