This spare gas cylinder is not part of the SodaStream exchange programme. Keep this cylinder as an extra so you can always make delicious fizzy drinks at home. When your cylinder is empty, simply exchange it at your local argos store for an exchange cylinder and only pay the cost of the gas refill. For use in SodaStream drinks maker. 1 x 60 litre bottles. Each bottle makes up to 60 litres. 60 litre capacity gas cylinder.