How do you break unbreakable Glass?

I know I might seem stupid asking this, but I’ve tryed looking this up in a web search, but I can’t seem to find any answers.

I know its called “Unbreakale Glass” but it must break somehow.

Like the unbreakable comb, I broke on of those once.

And that bendy ruler. Those aren’t suppose to break, but I broke one of those too.

So is there any way to break unbreakable glass?