[ldh]

The next logical step from paying SodaStream for weirdly proprietary CO2 is to simply buy a real tank of CO2 and a bottle-top adapter and make your own. I'm not sure how that could be "disrupted" without carving out a niche for a slightly-more-convenient but equally unnecessary middleman.

[vosper]

I'm basically thinking "the same product as Sodastream, but way cheaper". Like Specsavers did for glasses.

Granted, there may be a little less demand for home fizzy water than there is for good eyesight ;)

It's not like I have a plan to disrupt them, I just hate paying $30NZD for what I know is probably only 30c of gas, if that. I know there are shipping costs, retailer gets a cut etc...

I'm just griping :D

[city41]

Many Sodastream owners do things like this. Such as hook up a large, commercial CO2 tank, or refill Sodastream tanks with dry ice. Lots of videos on YouTube on this.