My nephew told me once that his science teacher told him that glass wasn’t a solid. I said his science teacher was stupid. It turns out I was.
Ye canna ney break da laws of physics laddie.
I once saw wavy glass in an OLD building and asked my dad why is that? He said “ Because glass is liquid, stupid.” As a four year old, it made me think and I learned from books.
Glass is a solid. That is how it holds liquid water in an 8 oz glass. All materials decay over time.