glass → uncountable
Meaning: the material used to make windows, bottles, fishbowls, etc.
Example sentence: Milk used to be sold in glass bottles, but now it comes in plastic containers.
glass → countable
Meaning: a drinking vessel made of glass
Example sentence: My daughter knocked over a glass of milk and it spilled all over the table.
In which sentence is the word "glass" countable?
Contributor: Matt Errey