Presumed to have been caused by bottles with cracks, which may occur before the filling process and when brought into the process container and close the lid. The pressure of the machine may cause cracks to occur.
Presumed to have been caused by a cracked bottle. This may occur before the filling process. When introduced into the container and close the lid. Air pressure can cause cracks caused rupture.
Assume that is caused by the bottle mouth is cracked. This may occur before the process of packing. And when taken into the process container cover. The pressure of the air may cause crack breakage.