Some SodaStreams, like the 3 Piece SodaStream Source, can be filled using 80,000 different retailers. However, it all depends on the type of SodaStream you own. If you need help with this on a private level, you should get in contact with their sparkle support team. However, if you are going to be using a different company’s cylinder, you should know that the guarantee that the full product comes with is no longer valid. Especially since it’s possible that another company’s cylinder can damage the sparkling water maker.