Add some bubbly to your celebration with this set of ICO CO2 soda chargers from Amazon They feature a durable non threaded, weld sealed stainless steel construction and the set includes 10 cartridges. Super-charged with 8 grams of natural, unadulterated CO2, this set is ideal for all makes of soda siphon. These chargers are ideal for carbonating soda, water and they are also great for antique pellet gun & toy car propellant. 8 grams.