FWIW the last one of mine that broke happened when I rocked it to aerate. 64dF wort went in (not remotely too hot). I didn't drop the thing, wasn't buzzed, nothing out o' the ordinary. All I could figure was that the temp changes over the years of being stored in the garage formed a small hairline crack in the wrong spot, and 20 stitches later I switched to buckets. I've brewed somewhere ~ 300 batches over the years and it only happened twice. But I got cut like hell both times. Buckets are cheaper, lighter, and work great.