
These CO2 canisters are medical / food grade unlike the ones from bike shops which may contain traces of oil and grease that can contaminate your drink.
Each canister will carbonate approximately 3 litres of liquid to standard carbonation level for a soft drink / beer / cider etc.
Each CO2 canister will dispense between 3 - 5 litres of carbonated drinks from one of the mini keg systems. If you leave empty space in your keg you will use more gas (eg putting 5L of beer in a 10L keg will require flushing a lot more air out and then pressurising with CO2 than you would have to with 5L of beer in a 5L keg)
Usually about $3 - $4.50 if bought singly (for instance at bicycle shops which sell them for use in tyre inflators)
They start at $2.50 each in a 10 pack and going down if you buy larger quantities
The thread is necessary for use with our mini regulators, unthreaded bulbs cannot be used.