Using a non-coring medical-grade needle that inserts through the cork, Coravin allows you to taste your wine without opening the bottle. Features include: New and improved SmartClamps are easy-on, easy-off High-tension clamps ensure stability and are adjustable to fit multiple bottle sizes Simply insert, tip, and pour Coravin inserts Argon gas into the bottle that preserves the wine in the bottle After the needle is removed, natural corks reseal to maintain a perfectly unopened bottle 1 Argon capsule is included with the system - allowing up to 15 glasses of wine (5 oz pours) Additional capsules sold separately Each system includes: Coravin Model 3 1 Standard non-coring needle 1 Argon gas capsule Should not be used in bottles with screw-caps except for Coravin resealable screw caps. Not ideal for synthetic corks, which do not reseal; use the Coravin once, then tape over the needle hole to keep bottle preserved. Taste your favorite wine without pulling the cork or opening the bottle.