How to preserve open wines in a restaurant (Coravin, etc.)?
Quick answer
Preserving open wines in a restaurant depends on the system: a vacuum stopper (Vacu Vin) keeps wine fresh 2-3 days, nitrogen spray (Winesave, Private Preserve) lasts 3-5 days, Coravin preserves indefinitely (extraction without opening), and professional nitrogen dispensers (Bermar, Enomatic) last 2-4 weeks. The choice depends on by-the-glass volume and budget.
Detailed answer
Preserving open wines is the key technical challenge of by-the-glass service. A poorly preserved wine loses its aromas in 24-48 hours and becomes unsellable — a straight loss.
The vacuum stopper (Vacu Vin, EUR 15) is the basic option: a hand pump removes air from the bottle. Real-world effectiveness: 2-3 days max for whites, 3-4 days for reds. Beyond that, oxidation takes over. Fine for a bar that turns bottles quickly.
Inert gas spray (nitrogen or argon) like Winesave (EUR 20 per can, roughly 100 uses) creates a protective layer over the wine. Preservation: 3-5 days for whites, 5-7 for reds. Best value for most restaurants.
The Coravin system (EUR 300-400) is a game-changer: a needle pierces the cork, wine is extracted under argon pressure, and the cork reseals naturally. Wine stays intact for months, even years. Perfect for offering premium wines by the glass with zero waste risk. Limitation: only works with natural cork closures.
Professional nitrogen dispensers (Bermar at EUR 800-1,500, Enomatic at EUR 2,000-5,000) are designed for wine bars and fine dining. They maintain wine at temperature under nitrogen for 2-4 weeks. The investment pays back in 3-6 months for a venue pouring 30+ glasses daily.
| System | Price | Preservation | Suitable wines | Recommended volume |
|---|---|---|---|---|
| Vacuum stopper (Vacu Vin) | EUR 15 | 2-3 days | Everyday wines | < 15 glasses/day |
| Nitrogen spray (Winesave) | EUR 20/can | 3-5 days | All wines | 15-30 glasses/day |
| Coravin (needle) | EUR 300-400 | Unlimited | Premium, natural cork | Wines > EUR 30/bottle |
| Bermar (N₂ dispenser) | EUR 800-1,500 | 2-3 weeks | All wines | 30-50 glasses/day |
| Enomatic (auto dispenser) | EUR 2,000-5,000 | 3-4 weeks | All wines | 50+ glasses/day |