I agree with everyone else. I would demand (in a nice way), a full account of exactly how this incident happened, and also to know why anything glass is where the children have access to it. If they do use glass, rather than plastic, I would make it known that you disapprove, and suggest to them that they make a switch to avoid any further accidents. If that's not an option they choose, then I'd have to be looking elsewhere for a different daycare. Tho Lyra's injury was bad, it could have been a whole lot worse. They most definitely should reimburse you for any out of pocket expense that you incurred because of them.

Good luck, and I hope Lyra forgets all about it soon.