The Coravin is a wine preservation system, a handheld device that allows wine to be poured directly from the bottle without exposing it to oxygen. How does this work? Though a thin, hollow needle that is inserted all the way into the cork. After the needle goes in, the bottle is pressurized with argon gas, and wine is poured out through the needle. When the needle is pulled out, the argon takes the place of the wine so that there is no oxidation.