I've been using these bottles since last three months. Initially I was very impressed with the product but later days onwards shrads from the glass bottle neck started falling off. I was scared to death what if that glass shrads gets mixed with my baby's milk. So now I'm stopping the usage of these bottles. As well, the lids of the bottles got expanded after sterilization.

Good qualityStill using in my 7 th month of postpartum . Using for storing pumped milk as well as warming milk . Be careful for accidental breakage

It's durable, convenient way to store expressed milk, you don't need to transfer it to your feeding bottle, just replace the lid with nipple, can be sterilized. Only flaw is, lid is not air tight.