Quoting K+J:" I haven't either, just saw it when I was looking for glass bottles online. just thought it would be a good idea for outings I would be afraid I would drop and break them! do you like the glass ones?"
The bottles I have are Nurture Pure or something like that. I didn't use them with my oldest because he couldn't take bottles and with my baby he takes them just fine. I have a slight issue with it leaking though if the nipple isn't on right but other than that no problems. I don't use them a lot but I would have them as my first choice if I go to formula only.