It's also used on cars to prevent "smash and grabs." Maybe one day "fragile glass" won't exist. More from Science A triangle pointing right which indicates this type of media can be played.

As the sea cucumber became trapped in the robot’s mechanical hand, researchers found its body to be “fragile” and thinly walled, according to the study. The animal’s skin was “glass-like ...

It would be helpful to have more systematic comparative studies of strong and fragile glass-formers, to explore the temperature dependence of these phenomena over as broad a range of temperature ...