The Coravin has become a popular tool in the professional circles of the wine business recently. From wine reps hitting the pavement to winery tasting rooms in the Willamette Valley, the Coravin system seems to be sanctioned for keeping fresh special bottles of wine. The average drinker or home consumer of wine may not know about this new device, which is available for home use. At a $300 price tag, many people may ask why? But first, let's ask what the Coravin is.