I have own this bottle for a few months now. My 3 and 6 year olds used them for school and now for camp and they are in excellent condition. They do not break and the silicone cover seems to really protect them. They are cute and not heavy compared to other glass bottles with silicon covers that I have found in the market. Great product and I'm planning to use the baby bottles/sippy cups in a few months with my baby. (Posted on 7/14/11)