So I created the water bubbler of SodaStream already about half a year and I still have so far only the first gas bottle in use. Surely that depends on how much and how often you use the Spruder. I use it very rarely in winter. I think the design is very well done and the glass bottle Siehr good. The only thing I do not understand at the bubbler, is the use instructions. It says, if I remember correctly, that you must press three times until a "pffrrfr" comes. With me is the press only after repeated, so I press until the "pfffr" comes. Some describe that the opening after a while clamped. This is true, comes with me also, but that is due to the great pressure that prevails inside. If you wait a few seconds, you can open the Spruder as usual. Is at least for me that way. So I have really nothing to complain about.