Leland CO2 soda charger - 8g Leland seltzer cartridge - 2 boxes of 50 100 Leland CO2 soda chargers; 2 boxes of 50 Quality Food-Grade CO2, Mr Fizz (LELAND) European Seltzer Chargers weld-sealed steel cartridges - virtually unlimited shelf-life! 8g Leland brand seltzer cartridges