It lasts about 10 days if you make 3 bottles a day, 3 presses and a duration of 1 second each time, it is a snap-on and not a screw-on, it does not fit all SodaStream machines, your device must say which cylinder it takes, around the 6th to 7th day and after 54 to 63 presses it starts to seem like it is running out, so far I have not refilled any at a store but I have bought 5 cylinders and I have spent 150 euros in 2 months and I have no way to refill it cheaply, that is, 10-12 euros per cylinder seems reasonable to me, above that I buy a new one, what can I say.

in terms of price alone it is not worth it. 28 euros for 50 maximum liters. that is, 0.54 euros per liter. at supermarkets it costs 0.40 and you don't even buy devices. it would make sense if it were cheaper

If I had known that it was so easy to make soft drinks and sodas, I would have saved a lot of money for years now. With the prices they have now, it is a wonderful machine and a must

Indeed, it produces very nice sparkling water; you can make it with as much carbonation as you want in your water. Personally, 3 presses is OK for me. (Towards the end of the bottle, the strength decreases, and it doesn't incorporate the carbonation satisfactorily, which is reasonable. The service for refilling the bottle is excellent (they bring you the new ones, and you return the empty ones without delivery cost). The downside is that the price for refilling is very high, almost €25; it could be at the level of the blue one, as they get the same amount of gas. That's why it gets one star less, which is for the price.

Good but very expensive, that's why I give 3 stars and not 5 which I would have given if it had a more reasonable price.

Be careful that the bottle you remove has the same color. If you have the blue one, this particular one won't work for you. Other than that, it does what it promises.