drinking glass vs container

drinking glass and container both are nouns.

Word	Noun	Adjective	Verb	Adverb
drinking glass	Yes	No	No	No
container	Yes	No	No	No

As nouns, container is a hypernym of drinking glass; that is, container is a word with a broader meaning than drinking glass:

drinking glass: a container made of glass for holding liquids while drinking
container: any object that can be used to hold things (especially a large metal boxlike object of standardized dimensions that can be loaded from one form of transport to another)

drinking glass (noun)	container (noun)
a container made of glass for holding liquids while drinking	any object that can be used to hold things (especially a large metal boxlike object of standardized dimensions that can be loaded from one form of transport to another)