They are pretty packed into a small shelf, so I wonder if separating them out a bit more would help, as they are touching.I also use glass for my water-glassing. I've not ever had a jar break. I would contact Ball company's customer service and ask for new jars. I think you may have got a bad batch. Maybe something physical happened to your jars, and you didn't notice. Perhaps they clanked into each other at some point, or got a large temp fluctuation. Any way, Ball jars should be able to handle stuff like that, and I would think the company would be very happy to replace them for you.
