Note: CO2 cartridges cannot be shipped internationally. If you live outside of the US you can purchase 16gram threaded (3/8x24 thread) food grade cartridges locally.
If you live in Canada, you can purchase TrailKeg CO2 here on amazon.ca.
TrailKeg CO2 cartridges are manufactured to meet food grade standards, meaning you get only the purest CO2 for carbonating and dispensing beverages. A single cartridge will dispense up to a gallon of your favorite beverage.