Stop spending money on expensive refills! If you've purchased a new SodaStream machine you'll notice all of your old bottles won't fit. Frustrating I know, now you have to go and buy more expensive canisters. Simply hook this up a 2.6kg or 6kg Tank and not worry about frequent refill costs.
A typical Soda Stream cylinder can only carbonate up to 60L and will cost about $20 per fill.  So given these figures the larger cylinder and this hose will pay itself off once you fill the 2.6kg gas cylinder once.  It's a no brainer!