I went with glass for the first 6 months.
Unfortunately, it was impossible to find a daycare that would accept glass bottles. They wouldn't touch them due to risk of breakage.
We went with polypropylene after that.
It's survived two babies (me and my sister), countless hikes, seaside vacations, boilings, reboilings, and probably a fair share of being thrown every which way. We still use it sometimes because it's handy as a measuring cup and I wouldn't be surprised if it stays in the family for a few more decades.
For comparison, I don't think a single piece of the "camping proof unbreakable" dish set my parents bought when I was ten is still alive.
Glass is tough.