The Legacy Cork Pops Refill Cartridges are packaged two refills per box so you can enjoy your Cork Pops Legacy Wine Opener over and over. Each Cork Pop Refill Cartridge will open approximately 60 - 80 bottles of wine before requiring replacement. The refill cartridges fit all cork pops models. The refill cartridges utilize an environmentally safe, low pressure CO2 propellant that does not affect the flavor or bouquet of any wine and has no effect on the atmosphere or ozone layer. Make sure you have the Legacy Cork Pops Refills on hand when you need them. Made in the USA!