I know, their tap water tastes awful.
SodaStream and SodaClub are old, I use them at least for 15 years now. I just wanted to point out that you need to buy the one that has a glass bottle and not the plastic one.
The point is, you don't have to carry loads of water home. Especially nice if you use your bike to go to the supermarket.still cheaper to buy bulk/generic bottled or even canned soda, but they're getting there.