We have a Soda Stream. We love it! We use it mainly for plain soda water, but the kids like to make sodas. The have a lot of flavored like root beer, cola, orange, grapefruit, diet and regular, lemon- lime, etc. they even have their own version of Red Bull. They are between 80 and 100 dollars depending on the brand of the soda maker you get. Then you have to replace the CO2 cartridges. One comes with the Soda Stream and you can exchange it where you got your machine for 15 dollars. If you buy an extra one it is 30 dollars.