A bit more research revealed that refills of the paintball canister, which is larger than a 60-liter SodaStream canister, can be done in a sporting goods store for $5. Some cocktail-napkin math revealed that the price per liter with this setup is about a quarter of the price of the all...
O.k I am personally Laughing my butt off at you people buying something for over $100 plus the cost of refills of the co2 cartridge when you can just mix vinegar and baking soda and use this cheap little kit and do it yourself and you have a nice 2 liter bottle of carbonated water ...