These Cork Pops refill cartridges provide a quick and easy way for you to replace your empty cartridges. Simply removed the empty cartridge from the Cork Pops unit and replace with a new one.  Open 100 bottles of wine with these cartridges and your Cork Pops wine bottle opener. Cork Pops bottle opener sold separately. This pack includes two cartridges. Each cartridge has enough CO2 to open 50 bottles of wine. Replacement process is as easy as pulling the empty one out and snapping a new one in.              For use with the Cork Pops wine bottle opener Open approx 50 bottles with one cartridge Includes 2 cartridges