Easy to use wine thief. Does just what its called...steals wine out of the carboy. Use to test taste the wine or take hydrometer readings without having to siphon. Unique one peice design. Insert into carboy, wine enters thief, remove from carboy and the thief magically holds the wine without dripping. Insert hydrometer into the top of thief. To release wine, press the bottom of thief against side of carboy or glass.