The Giovanni Cork Pops Refill Cartridges are packaged two refills per handing blister card so you can enjoy your Cork Pops 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, and utilize an environmentally safe, low-pressure inert propellant that does not affect the flavor or bouquet of any wine and has no effect on the atmosphere or ozone layer. The vinOstream uses the same cartridge; however, due to the difference in operation, each cartridge will aerate and dispense approximately 2 1/2 bottles (750 ml) bottles of wine. Available carded or boxed. Pricing is the same. Both the Giovanni and the Legacy refills fit all products - it is the packaging which varies (Giovanni - carded) Legacy (boxed)