Does anyone use these? Any recommendations? I have used BPA free tommee tippee closer to nature in the past but am keen to try glass rather than plastic, but there are less reviews and recommendations about. I would prefer a vented nipple if possible because that's what I've used before and I like the way they don't collapse. I LOVE the look of the silicone covered ones, but they're a bit pricy so was wondering if anyone had problems with breakages too.

Thanks in advance!