Enjoy a flight of wines without ever opening the bottles... Pair a wine with every course, and not open a single bottle. Yes, it's great! Coravin works on all cork-sealed, still wines. Tip the bottle as if you are pouring from an open bottle. Quickly press the trigger to pressurize the bottle with Argon - the cork will reseal and continue to protect your wine for weeks and months. Does Coravin really work? The verdict: not one glass. Not a single expert found even one glass to be oxidized, un-servable or unexpectedly varied. In fact, fewer than 6% percent of tasters were able to identify which glasses had been accessed with Coravin. Even more impressive considering that 6% is equivalent to random chance.