After a fiasco with a water bubbler with plastic bottles that were every 1-2 months already totally disgusting, because they scratch when clean, now glass. The plastic bottles were relatively expensive and it has totally annoyed that they have become so fast disgusting that even had an expiration date. What can I say, amazing ;-) The bottles are very sturdy, so far they have not gotten my kids broke. The water tastes excellent and is very durable, That does not lose so fast the carbon dioxide. Since that really strikes many, it seems to have no imagination that it tastes better than from plastic bottles. The closure is strict, (probably due to overpressure) but my eight-year-old also manages bottles with CO2 to fill. The lower part is made of sturdy cast iron, I can live with the fact that fall down from the neck a few drops of water on the floor, because it is indeed put into the water to fill it with CO2. Yes, the water is not filtered what someone criticized, but that is indeed promised nowhere, but there is an extra equipment. If the device is open, so you can reinstellen a carafe (as on the product photo), it is quite high, but is not a big gripe, fits only not under a very low-hanging cabinet, for example, you should know that. What is very convenient that everyone can make its waters so sprudelig, as he himself wants, but the three water bottles are perfect, just as for cooling.