Note:  Do not rely on this information. It is very old.

Bologna Phial

Bologna Phial, a short, narrow glass vessel open at one end only, made by the glass-blower to enable him to judge of the quality or material of the glass he is about to use. Being unannealed and suddenly cooled it is very friable, and though it will stand a fall on a brick floor, it will fly to pieces if a small hard body is dropped into it.