Compared against my Hevea bottles and other glass bottles these just break so easily. I have never had a breakage with any others. The glass is thin and really needs some kind of external protection if they are this thin.

Ease of use and look are great but overall an unsafe product for children.

I really wanted to love these baby bottles, they are beautifully designed with a retro feel, hevea rubber teats and a wide neck but unfortunately there seems to be a design flaw with the vent - after the first suck an air lock is created and poor babe is sucking away like mad but no milk comes out. I contacted the company who identified there must be an issue with the vent and sent me replacement teats without any fuss but the replacement teats do the same thing. I tried to make sure the vent was at the side at all times, screwed the teat on rather than pushing it on but no luck. I've given two stars due to the customer service and the look of the bottle, otherwise its one star for the bottle itself.