The glasses fall completely without violence or other mistreatment simply an oblique "seam" on the glass bottom apart. For me, my 12 Leonardo glasses have fallen apart at exactly the same place now despite rare Gebruach 4. On the first of these defective glasses I even cut myself properly when flushing. Another is a friend fallen apart while drinking and we were allowed to first wipe and clean. There is now even a picture of such a "cullet" here in Amazon - the breakdown always looks exactly the same.
The problem is not the way to treat my glasses but on the quality because 1) all of my other (NoName) hold drinking glasses 2.) the problem have exactly the same form in other
So fingers to fret away from these glasses and they disposed of rather than behind you over spilled drinks or lacerations. For as often as the problems with me and the other reviewers have occurred here, it will also get you sooner or later!