I bought these for my kid to use to take Pepsi to school in. The good is, they hold the pressure well and haven't leaked so far as I can tell. They're very light weight as well.The bad is the walls are very very thin on these and it dents very easily. I don't discount it much because as rough as my kid is on things, these still look pretty decent so the finish can't be that bad.Definitely would buy it again as it was pretty difficult to find one that would hold carbonated liquids well.UPDATE:So after a few months of using the same bottle, the cap on it has cracked. This is a minor crack which allows some pressure loss / liquid spillage. I still think this is an excellent product and I blame my son's carelessness for the crack. No real complaints. I've changed this to a 5 star review because well, it's worth it.