Pyrex is a popular household glassware company that is famous for making sturdy measuring cups and containers out of borosilicate glass. However, after Corning sold the Pyrex brand in 1998, the borosilicate glass was substituted for weaker tempered soda-lime glass in the United States. While it is arguably more resilient to drops, the soda-lime glass does not handle temperature shock as well as borosilicate glass. Exposing a hot glass to a cold surface, such as a wet granite countertop, can often result in the glass violently shattering.
The Slow Mo Guys demonstrate this problem using their ultra high-speed cameras and a blowtorch. After heating the handle of a Pyrex measuring cup with the flame it shatters into pieces after being sprayed with water. In order to capture the fracturing of the glass, they had to record the footage at over 343,000 frames-per-second (13,000x faster than the human eye can see) at a resolution of 256x144. Out of the 5.1 seconds of recorded footage, the handle shattering only occupied 0.000104 seconds.
Source: https://youtu.be/xbuvcQrAOSk (The Slow Mo Guys)
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