So, this happened today. Aonghas poured himself a glass of home pressed apple juice which he diluted and added some sugar to. ( he didn’t need to add sugar but he has a sweet tooth!) Then he put it on the table at his place to dinner. About 5 minutes later we heard the sound of glass breaking. The glass had spontaneously shattered! Very neatly but lots of mess! Apple juice all over but glass in a neat pile. We collected it all and put it on a plate to carry away but took a photo first.