Coravin Timeless™ and Pivot+® wine by-the-glass systems use 100% Pure Argon gas because it’s an inert, food-safe gas already trusted by winemakers to protect wine during production. Argon is heavier than oxygen, so it forms a protective barrier inside the bottle, shielding the remaining wine from oxygen and keeping it completely unaffected – allowing it to continue aging naturally for weeks, months, or even years, depending on the system.