Seriously? The baby bottle I had as a kid (27 years ago) was made of glass so thick I can't even begin to imagine what would break it.
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.