All you have to do is chill the stick in the freezer for up to 2 hours, but you can do it overnight if that’s easier. Then open your wine, pour a little into your glass to make some room, and put the stick in the bottle. The stick will keep your wine cold while the stopper at the top will seal the bottle for freshness. If you get the variety that also aerates as it pours, then you have a 4-in-1 device with everything you need.