Ceramic on Ceramic is Ceramics worst enemy.. Gotta be careful around ceramics / tiles / glass / wash basins etc :) Still the point is we do replace them under warranty :) If anything this break proves the overall engineering of the ring looks pretty sound as the break points weren't in the join locations but at the point of impact..
Still we can improve right, we could put an epoxy rim around the outside to absorb impact. I'm sure there are other things we could do too in future iterations to avoid issues like this. I will think on this, any other thoughts welcome :)