Honestly, as Dad I didn't give a shit. My wife and MIL were all about sterilising, and the liners aren't guaranteed sterile so for the first few months there's

Honestly, as Dad I didn't give a shit. My wife and MIL were all about sterilising, and the liners aren't guaranteed sterile so for the first few months there's the risk of thrush. We stopped because glass is too heavy for baby, which means they drop the bottle and I don't care what company claims they've got an "unshatterable" glass bottle, it will and it will when you're home alone with the baby and have to step on broken glass to get out the chair. (Sod's Law) When my wife was breast feeding we were using iirc madella bottles, they're a pump manufacturer and use all polyethylene for their parts and silicone for their nipples. The advantage of the Playtex system is that its very light, especially compared to some of the other bottles. In a rush you only need to wash the nipple, which comes in handy. And since my son started walking, having a bottle that cannot shatter is very reassuring. He can walk about with his bottle and I don't have to worry about him smacking it against the metal leg of a chair and smashing it (boys, it happens).