I recently had the chance to test out the Lifefactory Baby Bottle ($15) with my 10-month-old. The bottle is made of borosilicate glass, which means that, unlike a few other glass bottles on the market, it can withstand extreme temperature changes (such as going from the freezer to boiling water). While I didn't put it through that much of a shock, I was pleased that I wouldn't have to worry about the glass bottle breaking on me, especially because its silicone sleeve offered it even more protection.
Since I'm also a bit of a health nut when it comes to my guy, I was also glad to know that since the bottle is made of glass, I didn't have to worry about PVC, BPA, phthalates, and other nasties leaking into the bottle (the nipple's made of medical-grade silicone, too).
While I'm still breastfeeding, the bottle has been a good choice for milk when the babe is with the nanny, and I also used it over the holidays when the little guy suffered from some nasty flu virus. We used it for electrolytes and chamomile tea — the latter of which I poured into the bottle piping hot. Overall I've been really pleased with the design of this bottle, and would definitely recommend it to other mamas who are looking for a good, durable glass option. Happy bottle shopping!